# Data Analysis of Related Factors of Adolescent Physical Exercise Behavior Based upon Artificial Neural Network Model

Authors: Zhiling Chen; Xinghong Dai; Lili Ren
Journal: Wireless Communications and Mobile Computing
 (2022)

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## Abstract

Physical exercise behavior is to protect physical health through scientific physical activity (certain frequency, time, and intensity) in leisure time. The purpose of this paper is to study how to analyze and study the related factors of adolescent physical exercise behavior based on an artificial neural network model and describe the BP learning algorithm. This paper raises the question of the influencing factors of adolescents’ physical exercise behavior. This problem is based on an artificial neural network, so the paper expounds around the concept of artificial neural network and related algorithms and designs and analyzes relevant factors. The experimental results show that among the 4-17-year-old respondents, 45 students have the habit of physical exercise, accounting for 37.5% of the respondents in this age group. Among the 59 people with the habit of physical exercise in this survey, 41 people, accounting for 69.5%, believed that their interest in sports was greatly influenced by their surrounding classmates. There are 40 parents who have one parent who is college or above, accounting for 67.8% and other data. All of them show that the influencing factors of adolescents’ physical exercise behavior come from many aspects.


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## Body

## 1. Introduction

In recent years, with the rapid development of modern society and economy and the continuous popularization of science and technology, people’s living standards are improving day by day, and teenagers frequently use electronic products such as mobile phones and computers, and they are attracted to online games. At the same time, the academic pressure of modern teenagers is increasing. In addition to the after-school homework arranged by the school, there are also various remedial classes that parents are eager to sign up for them, and the students have no extra time to exercise. As a result, adolescents’ physical fitness levels are declining, and obesity and myopia rates are rising.Physical exercise is a subset of physical activity, with distinct social, group, cultural, educational, and so on. Improving the current situation of adolescents’ physical exercise and cultivating good physical exercise habits are important prerequisites for developing adolescents’ core literacy, improving social competitiveness and ensuring healthy quality of life, promoting the ultimate development of their physical exercise habits, and then enabling young people to develop in an all-round way.The innovations of this paper are as follows: (1) this paper combines the artificial neural network model with the physical exercise behavior of young people, introduces the theory and related methods of artificial neural network in detail, and mainly introduces the BP neural network and related learning algorithms. (2) In the face of the related factors of youth physical exercise behavior, this paper investigates and analyzes from four aspects: individual, school, family, and society. It is concluded that the influencing factor of adolescents’ physical exercise behavior is a multivariate and complex system, which is affected by many factors.


## 2. Related Work

An artificial neural network has been a research hotspot in the field of artificial intelligence since the 1980s. The research work of artificial neural network has continued to deepen and has made great progress. The focus of Ongpeng et al.’s study was to simulate the behavior of compressive stress using average strain in concrete and ultrasonic test results. A feedforward backpropagation artificial neural network (ANN) model was used to compare concrete mixtures with four different water-cement ratios (WC), ordinary concrete (ORC), and short steel fiber reinforced concrete (FRC). The artificial neural network model showed that the increased water-cement ratio produced a delayed response to pressure in the initial phase, followed by a sudden response after 40%. The response of FRC to stress is slower than that of ORC, indicating the resistance of short steel fibers to the delayed stress increase of the loading path. However, it is not stable enough [1]. Grandjean and Maier explored whether drive is present in artificial neural network models of the corticospinal system associated with biomechanically antagonistic wrist simulators. This model demonstrates complementary aspects of spindle output and driving force: muscle spindle activity as a driving force ± motor unit activity and afferent activity providing continuous sensory information, both of which are primarily driven by driving force. However, it is slower to respond [2]. Kang et al. aimed to develop an artificial neural network (ANN) model for predicting the cooling energy consumption of a variable refrigerant flow (VRF) cooling system by controlling different set points of variables. They used Matrix Labs (MATLAB) and its Neural Network Toolbox to develop artificial neural network models and test their prediction accuracy, collecting field datasets for model training and performance evaluation. The optimized model proves its prediction accuracy with stable prediction results. However, they did not take into account the practical feasibility [3]. Kumar et al. developed a hybrid model that combines Autoregressive Integrated Moving Average (ARIMA), Exponential GARCH (EGARCH), and artificial neural network (ANN). The hybrid ARIMA-EGARCH-ANN model is validated to provide advantages over traditional forecast accuracy measures and sign and direction changes and provides consistent results for both time series. This supports the robustness of the mixed model and provides practical use when developing trading strategies for the S%P 500 and Nifty indices. However, there are too many influencing factors in his experiment [4]. Ji et al. proposed an artificial neural network (ANN) model to rapidly predict private LRU cache behavior on out-of-order processors. The average root mean square error of this ANN model is less than 6%, and the prediction speed is increased by about 2.5 times to 3 times. However, their experimental data is not sufficient [5]. In the quest for an interpretable model, VK Chan and CW Chan proposed and compared two versions of neural network rule extraction algorithms. These two algorithms are called piecewise linear artificial neural network (PWL-ANN) and enhanced piecewise linear artificial neural network (enhanced PWL-ANN) algorithms. The comparison of results shows that compared with the PWL-ANN model, the enhanced PWL-ANN model supports improved fidelity to the original trained ANN model, and a more concise rule set can be generated using the enhanced PWL-ANN algorithm. However, the accuracy is lower [6]. Osman et al. proposed an artificial neural network (ANN) model for detecting reduced-rank attacks. The model consists of three stages: data preprocessing, feature extraction using a random forest classifier, and an artificial neural network model for detection. The proposed model has been tested in multi- and binary detection scenarios using the IRAD dataset and obtained results with good accuracy, precision, false positive rate, and AUC-ROC score. However, its application scope is limited [7]. Khoirunisa et al. introduced a geographic information system- (GIS-) based artificial neural network (GANN) model for flood susceptibility assessment in Keelung, Taiwan. The validation results showed that satisfactory results were obtained with a correlation coefficient of 0.814. They compared the model of the GANN model with the SOBEK model, and the results show that the method can provide good flood sensitivity prediction accuracy. However, their process is more complicated [8].


## 3. Learning Method Based on Artificial Neural Network

### 3.1. Basic Concepts of Neural Networks

Neural networks can be divided into biological neural networks and artificial neural networks. The biological neural network refers to the actual neural network existing in the brain, and the network constructed by imitating the biological neural network is an artificial neural network [9].The neuron in the artificial neural network is a biomimetic model established by taking the biological nerve cells as the imitation object. The artificial neural network model is produced by applying it to the field of artificial intelligence through the mathematical expression of the nervous system.An artificial neural network is an emerging inductive analysis tool. By simulating the way the brain works, it performs highly nonlinear fitting of complex functional limit functions. A large number of influencing factors and evaluation indicators are comprehensively analyzed and processed to find out the rules. An artificial neural network has been widely used in all walks of life due to its advantages of simple operation and small computational workload.The artificial neural network is just a simple model in the initial stage; see the following:(1)ya=sign∑wabxb−θa,where wab is a fixed weight.A neural network is a data processing model established under the inspiration of biological neural network. It originated in the 1940s and is one of the emerging research hotspots in the field of artificial intelligence in recent years [10]. A neural network is composed of many nodes (or “artificial neurons”), which are combined in different ways. Each node represents an output function, and the connection between each node represents a weighted value passing through the function, which can be called a weight or a weight. The neural network can adjust its own model structure according to external information; establish corresponding network models according to different network connection methods, weights, and function types; and finally achieve the actual modeling goal.


#### 3.1.1. Biological Neurons

The artificial neural network is to simulate the biological brain in an artificial way for calculation and analysis. Before describing the artificial neural network in detail, it is necessary to briefly describe the biological cerebral cortex nervous system. The human cerebral cortex nervous system is composed of a large number of neurons, about 1011 in number. These neurons communicate and transmit processing information through their own synapses and other neurons. Generally, each neuron will have a large number of synapses to connect with other neurons; the number is about 104 [11]. The structure of nerve cells is shown in Figure 1.Figure 1
Neuron architecture diagram.Neurons are composed of synapses, dendrites, axons, and nuclei. Neurons receive information from other neurons through synapses and contact points of other neurons’ nerve endings and transmit neural signals to the nucleus for processing. The nucleus has a threshold. When the signal strength from the neuron is higher than this threshold, the signal will be transmitted through the axon to the dendrite and then to the next neuron cell. If the signal strength is below this threshold, the signal will be suppressed and cannot be transmitted [12].Research by scholars has confirmed that the strength of nerve signals transmitted by each neuron through its own synapses is the same. The same signal transmitted to different neurons caused different effects. Some neurons are highly sensitive to this signal strength, while others are less sensitive to the signal. It all depends on the connection strength of synapses and nerve endings, and the connection strength of this synapse can be controlled by training the network.


#### 3.1.2. Artificial Neurons

Compared with the processing unit in the artificial neural network, the biological neuron is similar to it and also plays the role of transmitting signals. The way and criterion of signal transmission in each neuron of artificial neural network are the same as those of biological neuron. The neurons of the artificial neural network also have their own input and output functions, and they also have a threshold to control the output of the signal. The simplified structure of the artificial neuron is shown in Figure2.Figure 2
Neuron structure diagram.This model can be expressed as(2)y=f∑a=1nwaxa−η,where waa=1,2,⋯,n is the connection weight of this neuron and other neurons, xaa=1,2,⋯,n is the nerve signal transmitted by other neurons to this neuron, η is the threshold, f is the activation function, and n is the number of input signals.Activation functions are generally divided into four types: threshold function, linear function, sigmoid function, and bell function (Gaussian function).(1) Threshold Function. The threshold function is also called the step function, and it is also the simplest function among these four functions. The function expressions are shown in Formulas (3) and (4).
(3)fu=+1,u≥0,0,u<0.Formula (3) is a unipolar function, with 1 and 0 representing the activation and inhibition of neurons.
(4)fu=+1,u≥0,−1,u<0.Formula (4) is bipolar: +1,−1 are used to represent the activation and inhibition of neurons, and the functions of both are nonlinear.(2) Linear Function. As the most basic function, linear function plays a great role in the application of artificial neural network, it can properly amplify the input signal received by the neuron, and the expression is shown in
(5)fu=k×u+c.A piecewise linear function can also be derived from the basic linear function. This function can be used for classification and can approximate nonlinear amplification within a certain range. The formula is shown in(6)fu=1,u≥1,u,1>u>−1,−1,u≤−1.(3) S-Type Function. The full name of the sigmoid function is the sigmoid function, which is the most widely used in artificial neural networks. Sigmoid function is often used for calculation in function approximation and classification, function optimization, and other work [13]. The sigmoid function is divided into two categories: logarithmic sigmoid function and tangent sigmoid function, respectively; see the following:
(7)fu=11+exp−u,(8)fu=1−exp−u1+exp−u.The signal strength output by the logarithmic sigmoid function is relatively weak, and the output range is also fixed in the0,1 or −1,+1 interval. So the strength of the output signal can be increased by applying a coefficient ω to the variable u. When fu∈−1,1, the sigmoid function is bipolar; when fu∈0,1, the sigmoid function is unipolar, and the formula is shown in
(9)fu=11+exp−ωu.(4) Bell Function. The bell-shaped function, also known as the Gaussian function, is named because the graph is similar to the bell. The role of the bell-shaped function in the transmission process of the artificial neural network is also very large, especially in the RBF neural network, the frequency of use is very high, and the formula is shown in
(10)φax=exp−x2δa2,a=1,2,⋯,n.


### 3.2. Model of Artificial Neural Network

An artificial neural network is composed of a large number of artificial neurons connected to each other, which is an imitation and simplification of the human brain system.


#### 3.2.1. Network Structure of Neural Network

Neurons are connected into a network according to different connection forms, and a neural network with different structures can be formed. A feedforward neural network and feedback neural network are the most common types at present. The information transmission methods of the two neural networks are described as follows:(1) Feedforward Neural Network. In a feedforward neural network, the signal transmission process is unidirectional, and each neuron can transmit its own output signal as an input signal to the next layer of neurons and exit to the next stage without feedback in the network [14]. Feedforward neural networks can be either single-layered or multilayered. The more common feedforward neural networks include perceptron networks and error back propagation (BP) neural networks.(2) Feedback Neural Network. A feedback neural network is a kind of neural network that can transmit feedback information from output to input, and there is at least one loop in the connection between its neurons, that is, a feedback loop. In the feedback neural network, all nodes have the ability to process information independently, and each node can not only receive information from the outside world but also transmit information to the outside world. Common feedback neural networks include Hopfield network and Boltzmann machine.


#### 3.2.2. Learning of Neural Network

After neurons form a neural network according to different connection methods, they also need to follow certain learning rules and algorithms. The weights and topology of the network are constantly adjusted according to the error between the samples to reduce the error between the network output and the expected output, which is called network learning. The learning algorithm of neural network can be divided into learning with teachers and learning without teachers [15].Learning with a teacher means that there is a function equivalent to a “teacher” in the learning process of the network. During the learning process, the information of the training samples is transmitted to the input of the network, the output signal is compared with the expected output while the output signal is passed, and the error signal is passed. In this way, it controls the network weights. This process is repeated, and finally, the network converges to a certain weight. It uses neural network models learned by teachers, such as back-propagation networks and perceptrons.Teacher-less learning means that there is no teacher’s supervision in the learning process of the network system, and the network is directly placed in the environment. It relies on the neuron itself to continuously adapt to the input pattern and obtain the regularity of the input signal from it. The neural networks that use teacherless learning include Hebb learning rules and competitive learning rules.


### 3.3. BP Neural Network

The basic algorithm principle of the BP neural network is that the signal propagates forward in the network, and through the comparison with the expected output, the generated error is propagated back. In the process of back propagation, the error is distributed in each unit of each layer, which is also the basis for correcting the weights of each layer of the system. By repeatedly using the process to perform iterative operations, the weights are continuously adjusted until the error reaches a predefined requirement or a predefined number of repetitions. This is also the learning and training process of the entire network [16].


#### 3.3.1. Model Structure of BP Neural Network

(1) BP Neural Network Structure. A BP neural network consists of input layer, hidden layer, and output layer, and the hidden layer can have one or more layers. Figure 3 is a schematic diagram of a 3-layer neural network with 1 input layer, 1 hidden layer, and 1 output layer. The input layer contains n neuron nodes (i=1,2,⋯,n), and the input vector is x. The hidden layer contains Z neuron nodes (j=1,2,⋯,Z). The output layer contains m neuron nodes (k=1,2,⋯,m), and the output vector wij represents the connection weight between the neurons in the input layer and the neurons in the hidden layer. wjk represents the connection weight between neurons in the hidden layer and neurons in the output layer.Figure 3
Schematic diagram of BP neural network structure.The BP network usually has one or more hidden layers, the neurons in the hidden layers all use the sigmoid transformation function, and the neurons in the output layer use the pure linear transformation function.For a basic BP neuron, it hasK inputs, each of which is connected to the next layer through an appropriate weight w. The network output can be expressed as Formula (11), as shown in Figure 4.
(11)a=fw∗q,b.Figure 4
Basic BP neuron model.(2) Important Functions of BP Network. The conversion function of BP network is usually log-sigmoid type function lgsig or tan-sigmoid type function tansig. In some specific cases, it is also possible to use the pure linear function purelin. The transformation function of the output layer neurons usually adopts the pure linear function purelin.The sigmoid function has smooth and asymptotic lines and maintains monotonicity, and the function form is(12)a=fn11+e−n.The graphs of the logsig, tansig, and purelin functions are shown in Figures5–7, respectively.Figure 5
logsig conversion function.Figure 6
tansig transfer function.Figure 7
purelin transfer function.The training functions of the BP network include trainbp, trainpbx, and trainlm, and they use different learning rules and algorithms. The training speed of trainlm is the fastest, but it requires more storage space, the training speed of trainpbx is the second, and the training speed of trainbp is the slowest.The design function of the BP network is the newff function, and the network simulation function is the simuff function. The function initf can be used to initialize the BP network. When designing the BP network, as long as the input vector, the number of neurons in each layer, and the transfer function of the neurons in each layer are known, the function initf can be used to initialize the BP network.


#### 3.3.2. BP Neural Network Learning Algorithm

The core idea of BP algorithm is to use training samples and evaluation indicators to train the network, so that the error between the actual output and the expected output can meet the specified needs [17]. The BP algorithm consists of forward propagation of information and back propagation of errors.The forward pass is that the input sample is passed through each node of the input layer to each node of the hidden layer. The hidden layer processes the input sample information through the transfer function and transmits it to the output layer, and the output layer processes the output result through the transfer function after receiving the signal. In this section, the relationship between the input layer and the hidden layer can be expressed as(13)ya=f1∑b=1qwabxb−θa,a=1,2,⋯,z,where y is the output value of the hidden layer node, f is the transfer function, w is the connection weight, θ is the threshold, x is the input signal, a is the a-th hidden layer node, b is the b-th input layer node, and z is the z hidden layer nodes.The relationship between the hidden layer and the output layer is similar to the relationship between the input layer and the hidden layer.The backpropagation error compares the output with the expected value. If the error is too large, the error will be brought back to the output layer, then the hidden layer, and finally the input layer. During the back-propagation process, the connection weights and readings will be gradually changed. The network error function is as follows:(14)E=12∑c=1pt1−oc2.The output layer neuron error function is as follows:(15)δc=Tc−Ocf2′∑b=1qλcaya−θc.The hidden layer neuron error function is as follows:(16)ξa=f1′∑b=1qwabya−θa∑c=1qδcTca.A gradient descent method is the basic learning algorithm of BP neural network. Using this method to calculate the weights and thresholds of the network is as follows:The weight change of the output layer is as follows:(17)Δw2da=χtd−Odf2ya.The threshold change of the output layer is as follows:(18)Δθ2da=χtd−Odf2ya.The weight change of the hidden layer is as follows:(19)Δw1ab=χ∑d=1s2td−Od⋅f2⋅w2ab⋅xa.The threshold change of the hidden layer is as follows:(20)Δθ1a=χ∑d=1s2td−Od⋅f2⋅w2da⋅f1.The weights and thresholds in the error back propagation algorithm of the BP network are adjusted by the sum of the output errors and the changes of the weight readings. After repeated forward and reverse operations, the weights and thresholds of the network are optimized, and finally, the output of the network is within the range required by the error.


## 3.1. Basic Concepts of Neural Networks

Neural networks can be divided into biological neural networks and artificial neural networks. The biological neural network refers to the actual neural network existing in the brain, and the network constructed by imitating the biological neural network is an artificial neural network [9].The neuron in the artificial neural network is a biomimetic model established by taking the biological nerve cells as the imitation object. The artificial neural network model is produced by applying it to the field of artificial intelligence through the mathematical expression of the nervous system.An artificial neural network is an emerging inductive analysis tool. By simulating the way the brain works, it performs highly nonlinear fitting of complex functional limit functions. A large number of influencing factors and evaluation indicators are comprehensively analyzed and processed to find out the rules. An artificial neural network has been widely used in all walks of life due to its advantages of simple operation and small computational workload.The artificial neural network is just a simple model in the initial stage; see the following:(1)ya=sign∑wabxb−θa,where wab is a fixed weight.A neural network is a data processing model established under the inspiration of biological neural network. It originated in the 1940s and is one of the emerging research hotspots in the field of artificial intelligence in recent years [10]. A neural network is composed of many nodes (or “artificial neurons”), which are combined in different ways. Each node represents an output function, and the connection between each node represents a weighted value passing through the function, which can be called a weight or a weight. The neural network can adjust its own model structure according to external information; establish corresponding network models according to different network connection methods, weights, and function types; and finally achieve the actual modeling goal.


### 3.1.1. Biological Neurons

The artificial neural network is to simulate the biological brain in an artificial way for calculation and analysis. Before describing the artificial neural network in detail, it is necessary to briefly describe the biological cerebral cortex nervous system. The human cerebral cortex nervous system is composed of a large number of neurons, about 1011 in number. These neurons communicate and transmit processing information through their own synapses and other neurons. Generally, each neuron will have a large number of synapses to connect with other neurons; the number is about 104 [11]. The structure of nerve cells is shown in Figure 1.Figure 1
Neuron architecture diagram.Neurons are composed of synapses, dendrites, axons, and nuclei. Neurons receive information from other neurons through synapses and contact points of other neurons’ nerve endings and transmit neural signals to the nucleus for processing. The nucleus has a threshold. When the signal strength from the neuron is higher than this threshold, the signal will be transmitted through the axon to the dendrite and then to the next neuron cell. If the signal strength is below this threshold, the signal will be suppressed and cannot be transmitted [12].Research by scholars has confirmed that the strength of nerve signals transmitted by each neuron through its own synapses is the same. The same signal transmitted to different neurons caused different effects. Some neurons are highly sensitive to this signal strength, while others are less sensitive to the signal. It all depends on the connection strength of synapses and nerve endings, and the connection strength of this synapse can be controlled by training the network.


### 3.1.2. Artificial Neurons

Compared with the processing unit in the artificial neural network, the biological neuron is similar to it and also plays the role of transmitting signals. The way and criterion of signal transmission in each neuron of artificial neural network are the same as those of biological neuron. The neurons of the artificial neural network also have their own input and output functions, and they also have a threshold to control the output of the signal. The simplified structure of the artificial neuron is shown in Figure2.Figure 2
Neuron structure diagram.This model can be expressed as(2)y=f∑a=1nwaxa−η,where waa=1,2,⋯,n is the connection weight of this neuron and other neurons, xaa=1,2,⋯,n is the nerve signal transmitted by other neurons to this neuron, η is the threshold, f is the activation function, and n is the number of input signals.Activation functions are generally divided into four types: threshold function, linear function, sigmoid function, and bell function (Gaussian function).(1) Threshold Function. The threshold function is also called the step function, and it is also the simplest function among these four functions. The function expressions are shown in Formulas (3) and (4).
(3)fu=+1,u≥0,0,u<0.Formula (3) is a unipolar function, with 1 and 0 representing the activation and inhibition of neurons.
(4)fu=+1,u≥0,−1,u<0.Formula (4) is bipolar: +1,−1 are used to represent the activation and inhibition of neurons, and the functions of both are nonlinear.(2) Linear Function. As the most basic function, linear function plays a great role in the application of artificial neural network, it can properly amplify the input signal received by the neuron, and the expression is shown in
(5)fu=k×u+c.A piecewise linear function can also be derived from the basic linear function. This function can be used for classification and can approximate nonlinear amplification within a certain range. The formula is shown in(6)fu=1,u≥1,u,1>u>−1,−1,u≤−1.(3) S-Type Function. The full name of the sigmoid function is the sigmoid function, which is the most widely used in artificial neural networks. Sigmoid function is often used for calculation in function approximation and classification, function optimization, and other work [13]. The sigmoid function is divided into two categories: logarithmic sigmoid function and tangent sigmoid function, respectively; see the following:
(7)fu=11+exp−u,(8)fu=1−exp−u1+exp−u.The signal strength output by the logarithmic sigmoid function is relatively weak, and the output range is also fixed in the0,1 or −1,+1 interval. So the strength of the output signal can be increased by applying a coefficient ω to the variable u. When fu∈−1,1, the sigmoid function is bipolar; when fu∈0,1, the sigmoid function is unipolar, and the formula is shown in
(9)fu=11+exp−ωu.(4) Bell Function. The bell-shaped function, also known as the Gaussian function, is named because the graph is similar to the bell. The role of the bell-shaped function in the transmission process of the artificial neural network is also very large, especially in the RBF neural network, the frequency of use is very high, and the formula is shown in
(10)φax=exp−x2δa2,a=1,2,⋯,n.


## 3.1.1. Biological Neurons

The artificial neural network is to simulate the biological brain in an artificial way for calculation and analysis. Before describing the artificial neural network in detail, it is necessary to briefly describe the biological cerebral cortex nervous system. The human cerebral cortex nervous system is composed of a large number of neurons, about 1011 in number. These neurons communicate and transmit processing information through their own synapses and other neurons. Generally, each neuron will have a large number of synapses to connect with other neurons; the number is about 104 [11]. The structure of nerve cells is shown in Figure 1.Figure 1
Neuron architecture diagram.Neurons are composed of synapses, dendrites, axons, and nuclei. Neurons receive information from other neurons through synapses and contact points of other neurons’ nerve endings and transmit neural signals to the nucleus for processing. The nucleus has a threshold. When the signal strength from the neuron is higher than this threshold, the signal will be transmitted through the axon to the dendrite and then to the next neuron cell. If the signal strength is below this threshold, the signal will be suppressed and cannot be transmitted [12].Research by scholars has confirmed that the strength of nerve signals transmitted by each neuron through its own synapses is the same. The same signal transmitted to different neurons caused different effects. Some neurons are highly sensitive to this signal strength, while others are less sensitive to the signal. It all depends on the connection strength of synapses and nerve endings, and the connection strength of this synapse can be controlled by training the network.


## 3.1.2. Artificial Neurons

Compared with the processing unit in the artificial neural network, the biological neuron is similar to it and also plays the role of transmitting signals. The way and criterion of signal transmission in each neuron of artificial neural network are the same as those of biological neuron. The neurons of the artificial neural network also have their own input and output functions, and they also have a threshold to control the output of the signal. The simplified structure of the artificial neuron is shown in Figure2.Figure 2
Neuron structure diagram.This model can be expressed as(2)y=f∑a=1nwaxa−η,where waa=1,2,⋯,n is the connection weight of this neuron and other neurons, xaa=1,2,⋯,n is the nerve signal transmitted by other neurons to this neuron, η is the threshold, f is the activation function, and n is the number of input signals.Activation functions are generally divided into four types: threshold function, linear function, sigmoid function, and bell function (Gaussian function).(1) Threshold Function. The threshold function is also called the step function, and it is also the simplest function among these four functions. The function expressions are shown in Formulas (3) and (4).
(3)fu=+1,u≥0,0,u<0.Formula (3) is a unipolar function, with 1 and 0 representing the activation and inhibition of neurons.
(4)fu=+1,u≥0,−1,u<0.Formula (4) is bipolar: +1,−1 are used to represent the activation and inhibition of neurons, and the functions of both are nonlinear.(2) Linear Function. As the most basic function, linear function plays a great role in the application of artificial neural network, it can properly amplify the input signal received by the neuron, and the expression is shown in
(5)fu=k×u+c.A piecewise linear function can also be derived from the basic linear function. This function can be used for classification and can approximate nonlinear amplification within a certain range. The formula is shown in(6)fu=1,u≥1,u,1>u>−1,−1,u≤−1.(3) S-Type Function. The full name of the sigmoid function is the sigmoid function, which is the most widely used in artificial neural networks. Sigmoid function is often used for calculation in function approximation and classification, function optimization, and other work [13]. The sigmoid function is divided into two categories: logarithmic sigmoid function and tangent sigmoid function, respectively; see the following:
(7)fu=11+exp−u,(8)fu=1−exp−u1+exp−u.The signal strength output by the logarithmic sigmoid function is relatively weak, and the output range is also fixed in the0,1 or −1,+1 interval. So the strength of the output signal can be increased by applying a coefficient ω to the variable u. When fu∈−1,1, the sigmoid function is bipolar; when fu∈0,1, the sigmoid function is unipolar, and the formula is shown in
(9)fu=11+exp−ωu.(4) Bell Function. The bell-shaped function, also known as the Gaussian function, is named because the graph is similar to the bell. The role of the bell-shaped function in the transmission process of the artificial neural network is also very large, especially in the RBF neural network, the frequency of use is very high, and the formula is shown in
(10)φax=exp−x2δa2,a=1,2,⋯,n.


## 3.2. Model of Artificial Neural Network

An artificial neural network is composed of a large number of artificial neurons connected to each other, which is an imitation and simplification of the human brain system.


### 3.2.1. Network Structure of Neural Network

Neurons are connected into a network according to different connection forms, and a neural network with different structures can be formed. A feedforward neural network and feedback neural network are the most common types at present. The information transmission methods of the two neural networks are described as follows:(1) Feedforward Neural Network. In a feedforward neural network, the signal transmission process is unidirectional, and each neuron can transmit its own output signal as an input signal to the next layer of neurons and exit to the next stage without feedback in the network [14]. Feedforward neural networks can be either single-layered or multilayered. The more common feedforward neural networks include perceptron networks and error back propagation (BP) neural networks.(2) Feedback Neural Network. A feedback neural network is a kind of neural network that can transmit feedback information from output to input, and there is at least one loop in the connection between its neurons, that is, a feedback loop. In the feedback neural network, all nodes have the ability to process information independently, and each node can not only receive information from the outside world but also transmit information to the outside world. Common feedback neural networks include Hopfield network and Boltzmann machine.


### 3.2.2. Learning of Neural Network

After neurons form a neural network according to different connection methods, they also need to follow certain learning rules and algorithms. The weights and topology of the network are constantly adjusted according to the error between the samples to reduce the error between the network output and the expected output, which is called network learning. The learning algorithm of neural network can be divided into learning with teachers and learning without teachers [15].Learning with a teacher means that there is a function equivalent to a “teacher” in the learning process of the network. During the learning process, the information of the training samples is transmitted to the input of the network, the output signal is compared with the expected output while the output signal is passed, and the error signal is passed. In this way, it controls the network weights. This process is repeated, and finally, the network converges to a certain weight. It uses neural network models learned by teachers, such as back-propagation networks and perceptrons.Teacher-less learning means that there is no teacher’s supervision in the learning process of the network system, and the network is directly placed in the environment. It relies on the neuron itself to continuously adapt to the input pattern and obtain the regularity of the input signal from it. The neural networks that use teacherless learning include Hebb learning rules and competitive learning rules.


## 3.2.1. Network Structure of Neural Network

Neurons are connected into a network according to different connection forms, and a neural network with different structures can be formed. A feedforward neural network and feedback neural network are the most common types at present. The information transmission methods of the two neural networks are described as follows:(1) Feedforward Neural Network. In a feedforward neural network, the signal transmission process is unidirectional, and each neuron can transmit its own output signal as an input signal to the next layer of neurons and exit to the next stage without feedback in the network [14]. Feedforward neural networks can be either single-layered or multilayered. The more common feedforward neural networks include perceptron networks and error back propagation (BP) neural networks.(2) Feedback Neural Network. A feedback neural network is a kind of neural network that can transmit feedback information from output to input, and there is at least one loop in the connection between its neurons, that is, a feedback loop. In the feedback neural network, all nodes have the ability to process information independently, and each node can not only receive information from the outside world but also transmit information to the outside world. Common feedback neural networks include Hopfield network and Boltzmann machine.


## 3.2.2. Learning of Neural Network

After neurons form a neural network according to different connection methods, they also need to follow certain learning rules and algorithms. The weights and topology of the network are constantly adjusted according to the error between the samples to reduce the error between the network output and the expected output, which is called network learning. The learning algorithm of neural network can be divided into learning with teachers and learning without teachers [15].Learning with a teacher means that there is a function equivalent to a “teacher” in the learning process of the network. During the learning process, the information of the training samples is transmitted to the input of the network, the output signal is compared with the expected output while the output signal is passed, and the error signal is passed. In this way, it controls the network weights. This process is repeated, and finally, the network converges to a certain weight. It uses neural network models learned by teachers, such as back-propagation networks and perceptrons.Teacher-less learning means that there is no teacher’s supervision in the learning process of the network system, and the network is directly placed in the environment. It relies on the neuron itself to continuously adapt to the input pattern and obtain the regularity of the input signal from it. The neural networks that use teacherless learning include Hebb learning rules and competitive learning rules.


## 3.3. BP Neural Network

The basic algorithm principle of the BP neural network is that the signal propagates forward in the network, and through the comparison with the expected output, the generated error is propagated back. In the process of back propagation, the error is distributed in each unit of each layer, which is also the basis for correcting the weights of each layer of the system. By repeatedly using the process to perform iterative operations, the weights are continuously adjusted until the error reaches a predefined requirement or a predefined number of repetitions. This is also the learning and training process of the entire network [16].


### 3.3.1. Model Structure of BP Neural Network

(1) BP Neural Network Structure. A BP neural network consists of input layer, hidden layer, and output layer, and the hidden layer can have one or more layers. Figure 3 is a schematic diagram of a 3-layer neural network with 1 input layer, 1 hidden layer, and 1 output layer. The input layer contains n neuron nodes (i=1,2,⋯,n), and the input vector is x. The hidden layer contains Z neuron nodes (j=1,2,⋯,Z). The output layer contains m neuron nodes (k=1,2,⋯,m), and the output vector wij represents the connection weight between the neurons in the input layer and the neurons in the hidden layer. wjk represents the connection weight between neurons in the hidden layer and neurons in the output layer.Figure 3
Schematic diagram of BP neural network structure.The BP network usually has one or more hidden layers, the neurons in the hidden layers all use the sigmoid transformation function, and the neurons in the output layer use the pure linear transformation function.For a basic BP neuron, it hasK inputs, each of which is connected to the next layer through an appropriate weight w. The network output can be expressed as Formula (11), as shown in Figure 4.
(11)a=fw∗q,b.Figure 4
Basic BP neuron model.(2) Important Functions of BP Network. The conversion function of BP network is usually log-sigmoid type function lgsig or tan-sigmoid type function tansig. In some specific cases, it is also possible to use the pure linear function purelin. The transformation function of the output layer neurons usually adopts the pure linear function purelin.The sigmoid function has smooth and asymptotic lines and maintains monotonicity, and the function form is(12)a=fn11+e−n.The graphs of the logsig, tansig, and purelin functions are shown in Figures5–7, respectively.Figure 5
logsig conversion function.Figure 6
tansig transfer function.Figure 7
purelin transfer function.The training functions of the BP network include trainbp, trainpbx, and trainlm, and they use different learning rules and algorithms. The training speed of trainlm is the fastest, but it requires more storage space, the training speed of trainpbx is the second, and the training speed of trainbp is the slowest.The design function of the BP network is the newff function, and the network simulation function is the simuff function. The function initf can be used to initialize the BP network. When designing the BP network, as long as the input vector, the number of neurons in each layer, and the transfer function of the neurons in each layer are known, the function initf can be used to initialize the BP network.


### 3.3.2. BP Neural Network Learning Algorithm

The core idea of BP algorithm is to use training samples and evaluation indicators to train the network, so that the error between the actual output and the expected output can meet the specified needs [17]. The BP algorithm consists of forward propagation of information and back propagation of errors.The forward pass is that the input sample is passed through each node of the input layer to each node of the hidden layer. The hidden layer processes the input sample information through the transfer function and transmits it to the output layer, and the output layer processes the output result through the transfer function after receiving the signal. In this section, the relationship between the input layer and the hidden layer can be expressed as(13)ya=f1∑b=1qwabxb−θa,a=1,2,⋯,z,where y is the output value of the hidden layer node, f is the transfer function, w is the connection weight, θ is the threshold, x is the input signal, a is the a-th hidden layer node, b is the b-th input layer node, and z is the z hidden layer nodes.The relationship between the hidden layer and the output layer is similar to the relationship between the input layer and the hidden layer.The backpropagation error compares the output with the expected value. If the error is too large, the error will be brought back to the output layer, then the hidden layer, and finally the input layer. During the back-propagation process, the connection weights and readings will be gradually changed. The network error function is as follows:(14)E=12∑c=1pt1−oc2.The output layer neuron error function is as follows:(15)δc=Tc−Ocf2′∑b=1qλcaya−θc.The hidden layer neuron error function is as follows:(16)ξa=f1′∑b=1qwabya−θa∑c=1qδcTca.A gradient descent method is the basic learning algorithm of BP neural network. Using this method to calculate the weights and thresholds of the network is as follows:The weight change of the output layer is as follows:(17)Δw2da=χtd−Odf2ya.The threshold change of the output layer is as follows:(18)Δθ2da=χtd−Odf2ya.The weight change of the hidden layer is as follows:(19)Δw1ab=χ∑d=1s2td−Od⋅f2⋅w2ab⋅xa.The threshold change of the hidden layer is as follows:(20)Δθ1a=χ∑d=1s2td−Od⋅f2⋅w2da⋅f1.The weights and thresholds in the error back propagation algorithm of the BP network are adjusted by the sum of the output errors and the changes of the weight readings. After repeated forward and reverse operations, the weights and thresholds of the network are optimized, and finally, the output of the network is within the range required by the error.


## 3.3.1. Model Structure of BP Neural Network

(1) BP Neural Network Structure. A BP neural network consists of input layer, hidden layer, and output layer, and the hidden layer can have one or more layers. Figure 3 is a schematic diagram of a 3-layer neural network with 1 input layer, 1 hidden layer, and 1 output layer. The input layer contains n neuron nodes (i=1,2,⋯,n), and the input vector is x. The hidden layer contains Z neuron nodes (j=1,2,⋯,Z). The output layer contains m neuron nodes (k=1,2,⋯,m), and the output vector wij represents the connection weight between the neurons in the input layer and the neurons in the hidden layer. wjk represents the connection weight between neurons in the hidden layer and neurons in the output layer.Figure 3
Schematic diagram of BP neural network structure.The BP network usually has one or more hidden layers, the neurons in the hidden layers all use the sigmoid transformation function, and the neurons in the output layer use the pure linear transformation function.For a basic BP neuron, it hasK inputs, each of which is connected to the next layer through an appropriate weight w. The network output can be expressed as Formula (11), as shown in Figure 4.
(11)a=fw∗q,b.Figure 4
Basic BP neuron model.(2) Important Functions of BP Network. The conversion function of BP network is usually log-sigmoid type function lgsig or tan-sigmoid type function tansig. In some specific cases, it is also possible to use the pure linear function purelin. The transformation function of the output layer neurons usually adopts the pure linear function purelin.The sigmoid function has smooth and asymptotic lines and maintains monotonicity, and the function form is(12)a=fn11+e−n.The graphs of the logsig, tansig, and purelin functions are shown in Figures5–7, respectively.Figure 5
logsig conversion function.Figure 6
tansig transfer function.Figure 7
purelin transfer function.The training functions of the BP network include trainbp, trainpbx, and trainlm, and they use different learning rules and algorithms. The training speed of trainlm is the fastest, but it requires more storage space, the training speed of trainpbx is the second, and the training speed of trainbp is the slowest.The design function of the BP network is the newff function, and the network simulation function is the simuff function. The function initf can be used to initialize the BP network. When designing the BP network, as long as the input vector, the number of neurons in each layer, and the transfer function of the neurons in each layer are known, the function initf can be used to initialize the BP network.


## 3.3.2. BP Neural Network Learning Algorithm

The core idea of BP algorithm is to use training samples and evaluation indicators to train the network, so that the error between the actual output and the expected output can meet the specified needs [17]. The BP algorithm consists of forward propagation of information and back propagation of errors.The forward pass is that the input sample is passed through each node of the input layer to each node of the hidden layer. The hidden layer processes the input sample information through the transfer function and transmits it to the output layer, and the output layer processes the output result through the transfer function after receiving the signal. In this section, the relationship between the input layer and the hidden layer can be expressed as(13)ya=f1∑b=1qwabxb−θa,a=1,2,⋯,z,where y is the output value of the hidden layer node, f is the transfer function, w is the connection weight, θ is the threshold, x is the input signal, a is the a-th hidden layer node, b is the b-th input layer node, and z is the z hidden layer nodes.The relationship between the hidden layer and the output layer is similar to the relationship between the input layer and the hidden layer.The backpropagation error compares the output with the expected value. If the error is too large, the error will be brought back to the output layer, then the hidden layer, and finally the input layer. During the back-propagation process, the connection weights and readings will be gradually changed. The network error function is as follows:(14)E=12∑c=1pt1−oc2.The output layer neuron error function is as follows:(15)δc=Tc−Ocf2′∑b=1qλcaya−θc.The hidden layer neuron error function is as follows:(16)ξa=f1′∑b=1qwabya−θa∑c=1qδcTca.A gradient descent method is the basic learning algorithm of BP neural network. Using this method to calculate the weights and thresholds of the network is as follows:The weight change of the output layer is as follows:(17)Δw2da=χtd−Odf2ya.The threshold change of the output layer is as follows:(18)Δθ2da=χtd−Odf2ya.The weight change of the hidden layer is as follows:(19)Δw1ab=χ∑d=1s2td−Od⋅f2⋅w2ab⋅xa.The threshold change of the hidden layer is as follows:(20)Δθ1a=χ∑d=1s2td−Od⋅f2⋅w2da⋅f1.The weights and thresholds in the error back propagation algorithm of the BP network are adjusted by the sum of the output errors and the changes of the weight readings. After repeated forward and reverse operations, the weights and thresholds of the network are optimized, and finally, the output of the network is within the range required by the error.


## 4. Experiment and Analysis on Factors Related to Adolescent Physical Exercise Habits

### 4.1. Concept of Adolescent Physical Exercise Behavior

Adolescence is a transitional period for children to transform into adult roles. Adolescents are divided into two stages: 14-17 years and 18-25 years. 14-17 years old is the middle school period, and 18-25 years old is the university period.Physical exercise can enhance people’s psychological and social adaptability. It is an exercise in which people use various physical exercises to promote physical health and enhance physical fitness to prevent diseases and maintain physical and mental health. Sports behavior acts on people’s social life, and it is a conscious sports activity in which people use sports methods and means to achieve sports goals. The scope of sports behavior is relatively large. It is not only sports in usual cognition, such as running, playing basketball, and playing tennis, but also includes watching sports events, planning, and arranging sports events.Physical exercise is a physical activity behavior for adolescents to improve motor skills, reduce learning pressure, and gain sports fun. Physical exercise behavior is to protect physical health through scientific physical activity (certain frequency, time, and intensity) in leisure time. Physical exercise behavior is defined as combining the external environment, giving the body benign stimulation through physical exercises and sports methods, so as to achieve the purpose of enhancing physical fitness, preventing diseases, and enriching spiritual life. Physical exercise behavior is an activity method that can promote people’s physical health and regulate psychology. Physical exercise behavior is a physical activity for adolescents with the main purpose of exercising, enhancing physical fitness, and pleasing the mind and body [18, 19].


### 4.2. Influencing Factors

#### 4.2.1. Analysis of Individual Influencing Factors

(1) Gender and Age. As shown in Table 1, among the 200 valid questionnaires, there are 120 adolescents with an age structure of 14-17 years, accounting for 60% of the respondents. Among them, 56 were girls and 64 were boys, accounting for 46.7% and 53.3% of the respondents in this age group, respectively. There are 80 young people aged 18-25, accounting for 40% of the respondents. Among them, 40 were girls and 40 were boys, each accounting for 50% of the respondents in this age group.Table 1
Analysis of age and gender characteristics of respondents.
GenerationFemaleMaleTotalNumber of peopleProportion (%)Number of peopleProportion (%)Number of peopleProportion (%)14-17562864321206018-25402040208040Total964810452200100According to the analysis and comparison of the survey results of the physical exercise behavior habit development questionnaire, it is found that among the respondents in the age group of 14-17 years, the number of students with physical exercise behavior habits is 45. It accounted for 37.5% of the respondents in this age group. There are 32 boys and 13 girls. Among the respondents in the age group of 18-25, the number of students with physical exercise habits is 14, accounting for 17.5% of the respondents in this age group. There are 8 boys and 6 girls. That is to say, in the middle school stage, the proportion of students with physical exercise habits is relatively higher, among which boys are more than 2 times more than girls. At the university stage, the proportion of students with physical exercise habits is relatively small, and the difference between male and female students is not particularly large.The reasons for the situation may be due to: (1) In the middle school stage, there are more and more contacts with physical exercise. The number of people who have the habit of physical exercise is not very small, but when they arrive at the university, the pressure of study and employment increases, and the time for exercise is also compressed. (2) Due to the physiological reasons of girls, their interest in sports activities is getting lower and lower. This results in a much lower number of girls than those of boys who have physical exercise habits in secondary school [20].(2) Interest in Physical Exercise. Interest is a stable internal tendency that people tend to approach something or participate in an activity. Interest in physical exercise refers to the conscious tendency of people to engage in physical exercise. As shown in Table 2, among the 200 questionnaires effectively recovered in this survey, there are 59 people who have the habit of physical exercise. Among the 42 people who chose “like it very much,” 36 people have the habit of physical exercise, accounting for 85.7%. Among the 34 people who chose “like it,” 19 people have the habit of physical exercise, accounting for 55.9%, and 4 of the 79 people who choose “general interest” have the habit of physical exercise, accounting for 5.1%. Among the 45 people who chose “no interest,” the number of people who had the habit of physical exercise was 0. It can be inferred that the higher the interest in physical exercise, the more conducive to the formation of physical exercise habits.Table 2
Statistics of the survey results of interest in physical exercise and behavioral habits of physical exercise.
Number of people selected (person)The number of people who have the habit of physical exercise (person)Proportion (%)Total2005929.5Like it very much423685.7Love it341955.9General interest7945.1Not interested4500It can be seen that physical education teachers should encourage students’ interest in physical exercise and often actively affirm their achievements, so that they can fully enjoy the pleasure brought by physical exercise. In addition, it is necessary to make them continuously improve their physical and psychological resistance ability and hone their strong will quality in the process of participating in sports. This requires timely care, help, and encouragement when students encounter setbacks, thereby enhancing their self-confidence.(3) Personal Fitness. Physical fitness generally refers to the ability of a person’s body to engage in various physical activities. Physical fitness, as the basis for the human body to participate in sports, has a great influence on the self-perception of the participants in sports activities. As shown in Table 3, among the surveyed 59 people with physical exercise habits, 8 people have very good physical fitness, 36 people are relatively good, 13 people are average, and 2 people are very poor. The survey shows that some students with poor physical fitness may not get a positive and positive subjective experience like students with good physical fitness in the process of participating in physical exercise, which may affect their interest in physical exercise. This requires physical education teachers to adopt the method of teaching students in accordance with their aptitude, give patient guidance, and conduct positive and positive periodic evaluations, so as to mobilize the enthusiasm of young people with poor physical quality and guide them to participate in physical exercise.Table 3
Physical fitness status of adolescents with physical exercise habits.
Physical fitnessNumber of peopleProportion (%)Very good813.6Better3661.0Generally1322.0Very poor23.4Total59100


#### 4.2.2. Analysis of Influencing Factors of Schools

(1) Textbook Content and Teaching Methods. The content of physical education textbooks refers to the knowledge of various sports items involved in the physical education textbooks and the knowledge of related equipment and venues. The scientific and interesting content of physical education teaching materials is very important for young people who are initially exposed to physical activities to contact and deeply understand the role of physical activities. Scientific and reasonable physical education methods can enhance the interest in physical exercise. As shown in Figure 8, among the 200 people surveyed in this survey, 96 people believed that the setting of the content of the physical education materials would help them participate in physical exercise, and 52 of them had the habit of physical exercise. However, 104 people thought that the content setting of physical education materials did not help their physical exercise behavior. Only 7 of them had the habit of physical exercise. It can be seen that the content of physical education textbooks plays a fundamental role in popularizing and promoting physical exercise to young people. When choosing a question about the influence of physical education methods on interest in physical exercise, 135 people thought the influence was very large, 32 people thought it had a relatively large influence, and 21 people thought it had a small influence. Only 12 people thought it had no effect; among them, 38, 18, 3, and 0 people had more physical exercise habits. Therefore, the introduction of physical education teaching methods has the most important influence on improving young people’s interest in physical exercise, increasing the initiative of participation, and finally forming the habit of physical exercise.Figure 8
Survey respondents’ views on the significance of PE textbooks and the role of teaching methods.At present, the content setting of physical education textbooks is relatively scientific and reasonable, but some problems such as lack of interest should be paid attention to. When choosing the content of physical education teaching materials, we must try best to meet the needs of students at different levels. Young students should focus more on choosing recreational and interesting sports. In this way, it not only makes students willing to go deep into the teaching situation and maintain a happy mood, while strengthening the body, it also strengthens the desire to further participate in physical exercise. Students will unknowingly fall in love with physical exercise and then actively participate in sports activities. Physical education teachers should pay special attention to summarizing and reflecting on the experience of physical education teaching methods and explore teaching methods that can stimulate students’ enthusiasm for physical education to the greatest extent [21]. For example, when setting up some difficult sports, due to the gap of students’ abilities, the athletic talents of the students with better physical ability have been fully exerted, the learning is easier, the interest is stronger, and the initiative is naturally stronger. However, students with poor physical quality will have a strong sense of frustration because they are limited by their abilities and cannot meet or cannot meet the teaching requirements quickly, which requires physical education teachers to teach according to their aptitude. After the demonstration, the group practice method was used to group all the students according to the differences in athletic talent. It allows students whose level is roughly at the same level to be in the same group, the teachers make tours in groups, and the students in the same group communicate and discuss with each other. This will definitely create a more intense atmosphere, so all students’ interest in sports has been improved.(2) The Influence of Partners. Partnerships are a very important network of relationships as teenagers grow up. Informal groups facilitated by partnership are a common reference group when studying student behavior, and there are latent, unwritten group rules within such informal groups. This rule has a very important moderating effect on groups formed by partnership. It is mainly manifested in the indirect or direct influence on the cognition, attitude, values, aspiration level, and behavior tendency of the members of the informal group. If a group formed by a partnership has some students who are willing to participate in sports activities and are more gifted in sports, these students will especially want to show their talents in front of their partners. Over time, it will form an atmosphere of active participation in physical exercise within the group. In this way, students in this group will be driven to actively participate in physical exercise, forming a situation in which the group shares the fun brought by sports.As shown in Table4, among the 59 people who have the habit of physical exercise in this survey, 41 people, accounting for 69.5%, think that their sports interest is greatly influenced by their surrounding classmates. There are 10 people who think that they have been greatly influenced by their classmates, accounting for 16.9%, 5 people who think that they are less affected, accounting for 8.5%, and 3 people who think they are not affected, accounting for 5.1%. Among the 141 people who did not develop the habit of physical exercise, 34 people, accounting for 24.1%, believed that their interest in sports was greatly influenced by their surrounding classmates. There are 36 people who think that they have been greatly influenced by their classmates, accounting for 25.5%, 48 people who think that they are less affected, accounting for 34.1%, and 23 people who think they are not affected, accounting for 16.3%.Table 4
Questionnaire on the status of the respondents being influenced by their peers.
Very largeBiggerSmallerNo effectHave the habit of physical exerciseNumber of people411053Proportion (%)69.516.98.55.1No physical exercise habitNumber of people34364823Proportion (%)24.125.534.116.3From the data, it can be seen that due to the special physical and mental development characteristics of adolescents, they are more susceptible to the influence of their surrounding partners. Therefore, in the daily work of student management, teachers should pay attention to creating a good group public opinion atmosphere for actively participating in physical exercise among students of various natures. Because it is the response of the will of the group members, it is a very important educational factor and an important means to educate the group members.


#### 4.2.3. Analysis of Family Influencing Factors

(1) Family Economic Level. As shown in Figure 9, Figure 9(a) is the comparison of the number of people, and Figure 9(b) is the comparison of the proportions. Among the 59 people with the habit of physical exercise in this survey, 13 people have a monthly household income of more than 7,000 yuan, accounting for 22.0%. There are 36 people between 4000 and 6000 yuan, accounting for 61.0%. There are 8 people between 3,000 and 4,000 yuan, accounting for 13.6%, and 2 people below 3,000 yuan, accounting for 3.4%. Among the 141 people who have not developed the habit of physical exercise, 4 people have a monthly household income of more than 7,000 yuan, accounting for 2.8%. There are 18 people between 4000 and 6000 yuan, accounting for 12.8%. There are 82 people between 3000 and 4000 yuan, accounting for 58.2%, and 37 people below 3000 yuan, accounting for 26.2%. Therefore, there is a close relationship between the economic level of the family and the development of adolescents’ physical exercise habits. The economic basis is the basis for a family to engage in all social activities. The same is true in physical exercise. A higher family economic level can provide young people with a good material basis, such as sports equipment and equipment. After these preconditions for participating in physical exercise have been paid attention to, it will make young people more pleasant and safe to do physical exercise. It has a great influence on the awakening of youth sports awareness and the enhancement of sports interest.Figure 9
The monthly household income of the surveyed adolescents.
(a)(b)(2) Parents’ Cultural Level and Educational Concept. As shown in Figure 10, among the 59 people who have the habit of physical exercise in this survey, 7 people have a college degree or above, accounting for 11.9%, and 40 people have a college degree or above, accounting for 11.9%. The proportion is 67.8%. There are 12 students whose parents are below college degree, accounting for 20.3%. Among the 141 students who did not have the habit of physical exercise, there were 4 students whose parents had college education or above, accounting for 2.8%. There are 53 people with a college degree or above, accounting for 37.6%, and 84 people with parents below college education, accounting for 59.6%. Therefore, it can be seen that the higher the educational level of the parents, the more likely the teenagers will develop the habit of physical exercise. The reason for this connection is that people are influenced by family education throughout their life. Among them, parents’ understanding of the meaning of sports will gradually affect their children’s family life. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 50 people, accounting for 84.7%, believe that physical activities can promote the learning of cultural lessons. There are 6 people who think that physical exercise has nothing to do with the study of culture class, accounting for 10.2%, and 3 people who think that it will affect the study of culture class, accounting for 5.1%. Among the 141 people who did not have the habit of physical exercise, 112 of them believed that physical exercise would affect the learning of cultural lessons. Its proportion is 79.4%, 24 people think that it has nothing to do with the study of culture class, accounting for 17.0%, and 5 people think that it will promote the study of culture class, accounting for 3.5%. Therefore, it can be inferred that it is due to differences in parental education concepts. Some parents who believe that students should be promoted in an all-round way realize that physical exercise plays a huge role in promoting the healthy growth of children and the coordinated development of body and mind. Therefore, it will actively guide young people to learn sports culture knowledge, such as sports event reports through the Internet, newspapers, and other news media, to enhance children’s understanding of sports.Figure 10
Parental education level, educational concept, and adolescent physical exercise behavior.The higher the educational level of the parents, the more extensive the knowledge they dabble in, so they are more likely to realize the importance of physical exercise to the healthy growth of young people. In their daily life, they will often introduce them to the knowledge of physical exercise and will guide young people to learn preliminary sports techniques [22]. And it is full of the wisdom of the whole family and strives to devote itself to physical exercise activities, so as to normalize family physical activities. If things go on like this, children will gradually fall in love with sports and have a strong interest.In order to expand their children’s knowledge, many parents often buy various extracurricular reading materials and school textbooks for their children. They are basically English, mathematics, Chinese, or other books that develop intelligence, but parents rarely buy newspapers and magazines related to sports. Some parents seldom read or read newspapers because of their work characteristics. It has less exposure to sports-related news media, resulting in a lack of awareness of the meaning of sports. There are also some parents who know that a healthy body is a prerequisite for teenagers to better learn cultural knowledge. However, the way they keep students healthy is not by participating in sports activities, but by purchasing various nutritional supplements for their children. It allows children to stay at home and “wasting no time” to achieve the goal of “health.” In addition, although some parents have gradually realized the value of physical exercise and increased relevant educational investment, most of them are still at the stage of “learning performance-based.” They think their child’s body is inherently better. After students complete their learning tasks, use sports as a simple relaxation and just play casually. The situations all reflect that some parents have great cognitive misunderstandings in their educational concepts.


#### 4.2.4. Analysis of Social Influence Factors

(1) Community Venue Equipment and Community Outreach. In recent years, the investment in community sports facilities has increased year by year, and the status of sports equipment and facilities within the community has also received great attention. This makes it possible for people to participate in physical exercise in the community. However, while the community sports facilities are constantly being improved, we still need to face a severe situation—the current hardware conditions such as community sports facilities are far from meeting the current stage. The development needs of community sports in my country. Even some of the most basic and simple facilities, such as open spaces and other venues, are far from meeting the basic sports requirements of community residents. The status quo of such hardware facilities is in great contrast to the rapidly growing community sports crowd in our country. As a result, some residents who intend to participate in sports have to give up participating in sports because of the shortage of community sports hardware facilities. That will naturally include some teenagers. The sports hardware facilities in the community are an effective supplement to the school sports equipment and enrich the ways for young people to participate in physical exercise.As shown in Figure11, among the 59 people with physical exercise habits in this survey, 15 people think that the community sports venues are very complete, accounting for 25.4%, and 34 people think they are relatively complete, accounting for 25.4%. The proportion is 57.6%, and there are 10 people who think it is relatively small, accounting for 17.0%. Among the 141 people who have not formed physical exercise habits, 6 people think that the community sports venues are very complete, accounting for 4.3%, and 26 people think that they are relatively complete, accounting for 18.4%. There are 109 people with less equipment, accounting for 77.3%. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 18 people in their community vigorously promote physical exercise, accounting for 30.5%. There are 26 people who occasionally advertise, accounting for 44.1%, and 15 people who never advertise, accounting for 25.4%. Among the 141 people who did not have the habit of physical exercise, 12 people in their community vigorously promoted physical exercise, accounting for 8.5%. There are 46 people who advertise occasionally, accounting for 32.6%, and 83 people who never advertise physical exercise, accounting for 58.9%.Figure 11
The relationship between the equipment of community sports venues, sports publicity, and youth physical exercise habits.It can be seen that the sports venues and equipment in the community have a certain influence on the formation of adolescents’ physical exercise habits. Therefore, all walks of life must recognize the positive impact of the configuration of community sports venues on the behavior and habits of young people’s physical exercise and attach importance to the placement of community sports venues. On the other hand, the development of sports publicity work in the community has a certain influence on the formation of adolescents’ physical exercise habits. The reason is that vigorously publicizing knowledge about physical exercise in the community will enhance community residents’ understanding of related knowledge about physical exercise, form a community sports boom, and create a boom for everyone to participate in physical exercise. In this good sports environment, community residents, especially teenagers, will have herd behavior. If things go on like this, young people will feel the pleasure brought by physical exercise, and the simple behavior of conformity will gradually be internalized into the habit of physical exercise. Therefore, the community should pay attention to increasing the publicity of sports knowledge in the community.


### 4.3. Conclusion

Individual factors such as age, gender, interest in sports, and individual physical fitness can affect the formation of adolescents’ physical exercise habits. However, in reality, the individual factors of adolescents are often ignored, and they fail to reflect their dominant position in participating in physical exercise activities. They only passively engage in physical activities and fail to achieve the set goals.School education factors such as textbook content, teaching methods, and partners play an important role in the formation of adolescents’ physical exercise habits. In reality, in the process of promoting young people’s physical exercise habits, although some school education factors have received initial attention, they only remain at a very superficial level. And it did not form an effective close-knit system.Family education factors such as family income level, parental education level, and parental concept also affect the formation of physical exercise habits. At present, some parents have different degrees of cognitive biases on physical exercise, and they do not realize the important role of family education in the process of cultivating adolescents’ physical exercise habits.Social factors such as community venue equipment and community publicity are also necessary conditions for the formation of young people’s physical exercise habits. At present, the cultivation of young people’s physical exercise habits has not received attention from all walks of life, and there are problems such as lack of community sports venues and insufficient community sports publicity.


## 4.1. Concept of Adolescent Physical Exercise Behavior

Adolescence is a transitional period for children to transform into adult roles. Adolescents are divided into two stages: 14-17 years and 18-25 years. 14-17 years old is the middle school period, and 18-25 years old is the university period.Physical exercise can enhance people’s psychological and social adaptability. It is an exercise in which people use various physical exercises to promote physical health and enhance physical fitness to prevent diseases and maintain physical and mental health. Sports behavior acts on people’s social life, and it is a conscious sports activity in which people use sports methods and means to achieve sports goals. The scope of sports behavior is relatively large. It is not only sports in usual cognition, such as running, playing basketball, and playing tennis, but also includes watching sports events, planning, and arranging sports events.Physical exercise is a physical activity behavior for adolescents to improve motor skills, reduce learning pressure, and gain sports fun. Physical exercise behavior is to protect physical health through scientific physical activity (certain frequency, time, and intensity) in leisure time. Physical exercise behavior is defined as combining the external environment, giving the body benign stimulation through physical exercises and sports methods, so as to achieve the purpose of enhancing physical fitness, preventing diseases, and enriching spiritual life. Physical exercise behavior is an activity method that can promote people’s physical health and regulate psychology. Physical exercise behavior is a physical activity for adolescents with the main purpose of exercising, enhancing physical fitness, and pleasing the mind and body [18, 19].


## 4.2. Influencing Factors

### 4.2.1. Analysis of Individual Influencing Factors

(1) Gender and Age. As shown in Table 1, among the 200 valid questionnaires, there are 120 adolescents with an age structure of 14-17 years, accounting for 60% of the respondents. Among them, 56 were girls and 64 were boys, accounting for 46.7% and 53.3% of the respondents in this age group, respectively. There are 80 young people aged 18-25, accounting for 40% of the respondents. Among them, 40 were girls and 40 were boys, each accounting for 50% of the respondents in this age group.Table 1
Analysis of age and gender characteristics of respondents.
GenerationFemaleMaleTotalNumber of peopleProportion (%)Number of peopleProportion (%)Number of peopleProportion (%)14-17562864321206018-25402040208040Total964810452200100According to the analysis and comparison of the survey results of the physical exercise behavior habit development questionnaire, it is found that among the respondents in the age group of 14-17 years, the number of students with physical exercise behavior habits is 45. It accounted for 37.5% of the respondents in this age group. There are 32 boys and 13 girls. Among the respondents in the age group of 18-25, the number of students with physical exercise habits is 14, accounting for 17.5% of the respondents in this age group. There are 8 boys and 6 girls. That is to say, in the middle school stage, the proportion of students with physical exercise habits is relatively higher, among which boys are more than 2 times more than girls. At the university stage, the proportion of students with physical exercise habits is relatively small, and the difference between male and female students is not particularly large.The reasons for the situation may be due to: (1) In the middle school stage, there are more and more contacts with physical exercise. The number of people who have the habit of physical exercise is not very small, but when they arrive at the university, the pressure of study and employment increases, and the time for exercise is also compressed. (2) Due to the physiological reasons of girls, their interest in sports activities is getting lower and lower. This results in a much lower number of girls than those of boys who have physical exercise habits in secondary school [20].(2) Interest in Physical Exercise. Interest is a stable internal tendency that people tend to approach something or participate in an activity. Interest in physical exercise refers to the conscious tendency of people to engage in physical exercise. As shown in Table 2, among the 200 questionnaires effectively recovered in this survey, there are 59 people who have the habit of physical exercise. Among the 42 people who chose “like it very much,” 36 people have the habit of physical exercise, accounting for 85.7%. Among the 34 people who chose “like it,” 19 people have the habit of physical exercise, accounting for 55.9%, and 4 of the 79 people who choose “general interest” have the habit of physical exercise, accounting for 5.1%. Among the 45 people who chose “no interest,” the number of people who had the habit of physical exercise was 0. It can be inferred that the higher the interest in physical exercise, the more conducive to the formation of physical exercise habits.Table 2
Statistics of the survey results of interest in physical exercise and behavioral habits of physical exercise.
Number of people selected (person)The number of people who have the habit of physical exercise (person)Proportion (%)Total2005929.5Like it very much423685.7Love it341955.9General interest7945.1Not interested4500It can be seen that physical education teachers should encourage students’ interest in physical exercise and often actively affirm their achievements, so that they can fully enjoy the pleasure brought by physical exercise. In addition, it is necessary to make them continuously improve their physical and psychological resistance ability and hone their strong will quality in the process of participating in sports. This requires timely care, help, and encouragement when students encounter setbacks, thereby enhancing their self-confidence.(3) Personal Fitness. Physical fitness generally refers to the ability of a person’s body to engage in various physical activities. Physical fitness, as the basis for the human body to participate in sports, has a great influence on the self-perception of the participants in sports activities. As shown in Table 3, among the surveyed 59 people with physical exercise habits, 8 people have very good physical fitness, 36 people are relatively good, 13 people are average, and 2 people are very poor. The survey shows that some students with poor physical fitness may not get a positive and positive subjective experience like students with good physical fitness in the process of participating in physical exercise, which may affect their interest in physical exercise. This requires physical education teachers to adopt the method of teaching students in accordance with their aptitude, give patient guidance, and conduct positive and positive periodic evaluations, so as to mobilize the enthusiasm of young people with poor physical quality and guide them to participate in physical exercise.Table 3
Physical fitness status of adolescents with physical exercise habits.
Physical fitnessNumber of peopleProportion (%)Very good813.6Better3661.0Generally1322.0Very poor23.4Total59100


### 4.2.2. Analysis of Influencing Factors of Schools

(1) Textbook Content and Teaching Methods. The content of physical education textbooks refers to the knowledge of various sports items involved in the physical education textbooks and the knowledge of related equipment and venues. The scientific and interesting content of physical education teaching materials is very important for young people who are initially exposed to physical activities to contact and deeply understand the role of physical activities. Scientific and reasonable physical education methods can enhance the interest in physical exercise. As shown in Figure 8, among the 200 people surveyed in this survey, 96 people believed that the setting of the content of the physical education materials would help them participate in physical exercise, and 52 of them had the habit of physical exercise. However, 104 people thought that the content setting of physical education materials did not help their physical exercise behavior. Only 7 of them had the habit of physical exercise. It can be seen that the content of physical education textbooks plays a fundamental role in popularizing and promoting physical exercise to young people. When choosing a question about the influence of physical education methods on interest in physical exercise, 135 people thought the influence was very large, 32 people thought it had a relatively large influence, and 21 people thought it had a small influence. Only 12 people thought it had no effect; among them, 38, 18, 3, and 0 people had more physical exercise habits. Therefore, the introduction of physical education teaching methods has the most important influence on improving young people’s interest in physical exercise, increasing the initiative of participation, and finally forming the habit of physical exercise.Figure 8
Survey respondents’ views on the significance of PE textbooks and the role of teaching methods.At present, the content setting of physical education textbooks is relatively scientific and reasonable, but some problems such as lack of interest should be paid attention to. When choosing the content of physical education teaching materials, we must try best to meet the needs of students at different levels. Young students should focus more on choosing recreational and interesting sports. In this way, it not only makes students willing to go deep into the teaching situation and maintain a happy mood, while strengthening the body, it also strengthens the desire to further participate in physical exercise. Students will unknowingly fall in love with physical exercise and then actively participate in sports activities. Physical education teachers should pay special attention to summarizing and reflecting on the experience of physical education teaching methods and explore teaching methods that can stimulate students’ enthusiasm for physical education to the greatest extent [21]. For example, when setting up some difficult sports, due to the gap of students’ abilities, the athletic talents of the students with better physical ability have been fully exerted, the learning is easier, the interest is stronger, and the initiative is naturally stronger. However, students with poor physical quality will have a strong sense of frustration because they are limited by their abilities and cannot meet or cannot meet the teaching requirements quickly, which requires physical education teachers to teach according to their aptitude. After the demonstration, the group practice method was used to group all the students according to the differences in athletic talent. It allows students whose level is roughly at the same level to be in the same group, the teachers make tours in groups, and the students in the same group communicate and discuss with each other. This will definitely create a more intense atmosphere, so all students’ interest in sports has been improved.(2) The Influence of Partners. Partnerships are a very important network of relationships as teenagers grow up. Informal groups facilitated by partnership are a common reference group when studying student behavior, and there are latent, unwritten group rules within such informal groups. This rule has a very important moderating effect on groups formed by partnership. It is mainly manifested in the indirect or direct influence on the cognition, attitude, values, aspiration level, and behavior tendency of the members of the informal group. If a group formed by a partnership has some students who are willing to participate in sports activities and are more gifted in sports, these students will especially want to show their talents in front of their partners. Over time, it will form an atmosphere of active participation in physical exercise within the group. In this way, students in this group will be driven to actively participate in physical exercise, forming a situation in which the group shares the fun brought by sports.As shown in Table4, among the 59 people who have the habit of physical exercise in this survey, 41 people, accounting for 69.5%, think that their sports interest is greatly influenced by their surrounding classmates. There are 10 people who think that they have been greatly influenced by their classmates, accounting for 16.9%, 5 people who think that they are less affected, accounting for 8.5%, and 3 people who think they are not affected, accounting for 5.1%. Among the 141 people who did not develop the habit of physical exercise, 34 people, accounting for 24.1%, believed that their interest in sports was greatly influenced by their surrounding classmates. There are 36 people who think that they have been greatly influenced by their classmates, accounting for 25.5%, 48 people who think that they are less affected, accounting for 34.1%, and 23 people who think they are not affected, accounting for 16.3%.Table 4
Questionnaire on the status of the respondents being influenced by their peers.
Very largeBiggerSmallerNo effectHave the habit of physical exerciseNumber of people411053Proportion (%)69.516.98.55.1No physical exercise habitNumber of people34364823Proportion (%)24.125.534.116.3From the data, it can be seen that due to the special physical and mental development characteristics of adolescents, they are more susceptible to the influence of their surrounding partners. Therefore, in the daily work of student management, teachers should pay attention to creating a good group public opinion atmosphere for actively participating in physical exercise among students of various natures. Because it is the response of the will of the group members, it is a very important educational factor and an important means to educate the group members.


### 4.2.3. Analysis of Family Influencing Factors

(1) Family Economic Level. As shown in Figure 9, Figure 9(a) is the comparison of the number of people, and Figure 9(b) is the comparison of the proportions. Among the 59 people with the habit of physical exercise in this survey, 13 people have a monthly household income of more than 7,000 yuan, accounting for 22.0%. There are 36 people between 4000 and 6000 yuan, accounting for 61.0%. There are 8 people between 3,000 and 4,000 yuan, accounting for 13.6%, and 2 people below 3,000 yuan, accounting for 3.4%. Among the 141 people who have not developed the habit of physical exercise, 4 people have a monthly household income of more than 7,000 yuan, accounting for 2.8%. There are 18 people between 4000 and 6000 yuan, accounting for 12.8%. There are 82 people between 3000 and 4000 yuan, accounting for 58.2%, and 37 people below 3000 yuan, accounting for 26.2%. Therefore, there is a close relationship between the economic level of the family and the development of adolescents’ physical exercise habits. The economic basis is the basis for a family to engage in all social activities. The same is true in physical exercise. A higher family economic level can provide young people with a good material basis, such as sports equipment and equipment. After these preconditions for participating in physical exercise have been paid attention to, it will make young people more pleasant and safe to do physical exercise. It has a great influence on the awakening of youth sports awareness and the enhancement of sports interest.Figure 9
The monthly household income of the surveyed adolescents.
(a)(b)(2) Parents’ Cultural Level and Educational Concept. As shown in Figure 10, among the 59 people who have the habit of physical exercise in this survey, 7 people have a college degree or above, accounting for 11.9%, and 40 people have a college degree or above, accounting for 11.9%. The proportion is 67.8%. There are 12 students whose parents are below college degree, accounting for 20.3%. Among the 141 students who did not have the habit of physical exercise, there were 4 students whose parents had college education or above, accounting for 2.8%. There are 53 people with a college degree or above, accounting for 37.6%, and 84 people with parents below college education, accounting for 59.6%. Therefore, it can be seen that the higher the educational level of the parents, the more likely the teenagers will develop the habit of physical exercise. The reason for this connection is that people are influenced by family education throughout their life. Among them, parents’ understanding of the meaning of sports will gradually affect their children’s family life. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 50 people, accounting for 84.7%, believe that physical activities can promote the learning of cultural lessons. There are 6 people who think that physical exercise has nothing to do with the study of culture class, accounting for 10.2%, and 3 people who think that it will affect the study of culture class, accounting for 5.1%. Among the 141 people who did not have the habit of physical exercise, 112 of them believed that physical exercise would affect the learning of cultural lessons. Its proportion is 79.4%, 24 people think that it has nothing to do with the study of culture class, accounting for 17.0%, and 5 people think that it will promote the study of culture class, accounting for 3.5%. Therefore, it can be inferred that it is due to differences in parental education concepts. Some parents who believe that students should be promoted in an all-round way realize that physical exercise plays a huge role in promoting the healthy growth of children and the coordinated development of body and mind. Therefore, it will actively guide young people to learn sports culture knowledge, such as sports event reports through the Internet, newspapers, and other news media, to enhance children’s understanding of sports.Figure 10
Parental education level, educational concept, and adolescent physical exercise behavior.The higher the educational level of the parents, the more extensive the knowledge they dabble in, so they are more likely to realize the importance of physical exercise to the healthy growth of young people. In their daily life, they will often introduce them to the knowledge of physical exercise and will guide young people to learn preliminary sports techniques [22]. And it is full of the wisdom of the whole family and strives to devote itself to physical exercise activities, so as to normalize family physical activities. If things go on like this, children will gradually fall in love with sports and have a strong interest.In order to expand their children’s knowledge, many parents often buy various extracurricular reading materials and school textbooks for their children. They are basically English, mathematics, Chinese, or other books that develop intelligence, but parents rarely buy newspapers and magazines related to sports. Some parents seldom read or read newspapers because of their work characteristics. It has less exposure to sports-related news media, resulting in a lack of awareness of the meaning of sports. There are also some parents who know that a healthy body is a prerequisite for teenagers to better learn cultural knowledge. However, the way they keep students healthy is not by participating in sports activities, but by purchasing various nutritional supplements for their children. It allows children to stay at home and “wasting no time” to achieve the goal of “health.” In addition, although some parents have gradually realized the value of physical exercise and increased relevant educational investment, most of them are still at the stage of “learning performance-based.” They think their child’s body is inherently better. After students complete their learning tasks, use sports as a simple relaxation and just play casually. The situations all reflect that some parents have great cognitive misunderstandings in their educational concepts.


### 4.2.4. Analysis of Social Influence Factors

(1) Community Venue Equipment and Community Outreach. In recent years, the investment in community sports facilities has increased year by year, and the status of sports equipment and facilities within the community has also received great attention. This makes it possible for people to participate in physical exercise in the community. However, while the community sports facilities are constantly being improved, we still need to face a severe situation—the current hardware conditions such as community sports facilities are far from meeting the current stage. The development needs of community sports in my country. Even some of the most basic and simple facilities, such as open spaces and other venues, are far from meeting the basic sports requirements of community residents. The status quo of such hardware facilities is in great contrast to the rapidly growing community sports crowd in our country. As a result, some residents who intend to participate in sports have to give up participating in sports because of the shortage of community sports hardware facilities. That will naturally include some teenagers. The sports hardware facilities in the community are an effective supplement to the school sports equipment and enrich the ways for young people to participate in physical exercise.As shown in Figure11, among the 59 people with physical exercise habits in this survey, 15 people think that the community sports venues are very complete, accounting for 25.4%, and 34 people think they are relatively complete, accounting for 25.4%. The proportion is 57.6%, and there are 10 people who think it is relatively small, accounting for 17.0%. Among the 141 people who have not formed physical exercise habits, 6 people think that the community sports venues are very complete, accounting for 4.3%, and 26 people think that they are relatively complete, accounting for 18.4%. There are 109 people with less equipment, accounting for 77.3%. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 18 people in their community vigorously promote physical exercise, accounting for 30.5%. There are 26 people who occasionally advertise, accounting for 44.1%, and 15 people who never advertise, accounting for 25.4%. Among the 141 people who did not have the habit of physical exercise, 12 people in their community vigorously promoted physical exercise, accounting for 8.5%. There are 46 people who advertise occasionally, accounting for 32.6%, and 83 people who never advertise physical exercise, accounting for 58.9%.Figure 11
The relationship between the equipment of community sports venues, sports publicity, and youth physical exercise habits.It can be seen that the sports venues and equipment in the community have a certain influence on the formation of adolescents’ physical exercise habits. Therefore, all walks of life must recognize the positive impact of the configuration of community sports venues on the behavior and habits of young people’s physical exercise and attach importance to the placement of community sports venues. On the other hand, the development of sports publicity work in the community has a certain influence on the formation of adolescents’ physical exercise habits. The reason is that vigorously publicizing knowledge about physical exercise in the community will enhance community residents’ understanding of related knowledge about physical exercise, form a community sports boom, and create a boom for everyone to participate in physical exercise. In this good sports environment, community residents, especially teenagers, will have herd behavior. If things go on like this, young people will feel the pleasure brought by physical exercise, and the simple behavior of conformity will gradually be internalized into the habit of physical exercise. Therefore, the community should pay attention to increasing the publicity of sports knowledge in the community.


## 4.2.1. Analysis of Individual Influencing Factors

(1) Gender and Age. As shown in Table 1, among the 200 valid questionnaires, there are 120 adolescents with an age structure of 14-17 years, accounting for 60% of the respondents. Among them, 56 were girls and 64 were boys, accounting for 46.7% and 53.3% of the respondents in this age group, respectively. There are 80 young people aged 18-25, accounting for 40% of the respondents. Among them, 40 were girls and 40 were boys, each accounting for 50% of the respondents in this age group.Table 1
Analysis of age and gender characteristics of respondents.
GenerationFemaleMaleTotalNumber of peopleProportion (%)Number of peopleProportion (%)Number of peopleProportion (%)14-17562864321206018-25402040208040Total964810452200100According to the analysis and comparison of the survey results of the physical exercise behavior habit development questionnaire, it is found that among the respondents in the age group of 14-17 years, the number of students with physical exercise behavior habits is 45. It accounted for 37.5% of the respondents in this age group. There are 32 boys and 13 girls. Among the respondents in the age group of 18-25, the number of students with physical exercise habits is 14, accounting for 17.5% of the respondents in this age group. There are 8 boys and 6 girls. That is to say, in the middle school stage, the proportion of students with physical exercise habits is relatively higher, among which boys are more than 2 times more than girls. At the university stage, the proportion of students with physical exercise habits is relatively small, and the difference between male and female students is not particularly large.The reasons for the situation may be due to: (1) In the middle school stage, there are more and more contacts with physical exercise. The number of people who have the habit of physical exercise is not very small, but when they arrive at the university, the pressure of study and employment increases, and the time for exercise is also compressed. (2) Due to the physiological reasons of girls, their interest in sports activities is getting lower and lower. This results in a much lower number of girls than those of boys who have physical exercise habits in secondary school [20].(2) Interest in Physical Exercise. Interest is a stable internal tendency that people tend to approach something or participate in an activity. Interest in physical exercise refers to the conscious tendency of people to engage in physical exercise. As shown in Table 2, among the 200 questionnaires effectively recovered in this survey, there are 59 people who have the habit of physical exercise. Among the 42 people who chose “like it very much,” 36 people have the habit of physical exercise, accounting for 85.7%. Among the 34 people who chose “like it,” 19 people have the habit of physical exercise, accounting for 55.9%, and 4 of the 79 people who choose “general interest” have the habit of physical exercise, accounting for 5.1%. Among the 45 people who chose “no interest,” the number of people who had the habit of physical exercise was 0. It can be inferred that the higher the interest in physical exercise, the more conducive to the formation of physical exercise habits.Table 2
Statistics of the survey results of interest in physical exercise and behavioral habits of physical exercise.
Number of people selected (person)The number of people who have the habit of physical exercise (person)Proportion (%)Total2005929.5Like it very much423685.7Love it341955.9General interest7945.1Not interested4500It can be seen that physical education teachers should encourage students’ interest in physical exercise and often actively affirm their achievements, so that they can fully enjoy the pleasure brought by physical exercise. In addition, it is necessary to make them continuously improve their physical and psychological resistance ability and hone their strong will quality in the process of participating in sports. This requires timely care, help, and encouragement when students encounter setbacks, thereby enhancing their self-confidence.(3) Personal Fitness. Physical fitness generally refers to the ability of a person’s body to engage in various physical activities. Physical fitness, as the basis for the human body to participate in sports, has a great influence on the self-perception of the participants in sports activities. As shown in Table 3, among the surveyed 59 people with physical exercise habits, 8 people have very good physical fitness, 36 people are relatively good, 13 people are average, and 2 people are very poor. The survey shows that some students with poor physical fitness may not get a positive and positive subjective experience like students with good physical fitness in the process of participating in physical exercise, which may affect their interest in physical exercise. This requires physical education teachers to adopt the method of teaching students in accordance with their aptitude, give patient guidance, and conduct positive and positive periodic evaluations, so as to mobilize the enthusiasm of young people with poor physical quality and guide them to participate in physical exercise.Table 3
Physical fitness status of adolescents with physical exercise habits.
Physical fitnessNumber of peopleProportion (%)Very good813.6Better3661.0Generally1322.0Very poor23.4Total59100


## 4.2.2. Analysis of Influencing Factors of Schools

(1) Textbook Content and Teaching Methods. The content of physical education textbooks refers to the knowledge of various sports items involved in the physical education textbooks and the knowledge of related equipment and venues. The scientific and interesting content of physical education teaching materials is very important for young people who are initially exposed to physical activities to contact and deeply understand the role of physical activities. Scientific and reasonable physical education methods can enhance the interest in physical exercise. As shown in Figure 8, among the 200 people surveyed in this survey, 96 people believed that the setting of the content of the physical education materials would help them participate in physical exercise, and 52 of them had the habit of physical exercise. However, 104 people thought that the content setting of physical education materials did not help their physical exercise behavior. Only 7 of them had the habit of physical exercise. It can be seen that the content of physical education textbooks plays a fundamental role in popularizing and promoting physical exercise to young people. When choosing a question about the influence of physical education methods on interest in physical exercise, 135 people thought the influence was very large, 32 people thought it had a relatively large influence, and 21 people thought it had a small influence. Only 12 people thought it had no effect; among them, 38, 18, 3, and 0 people had more physical exercise habits. Therefore, the introduction of physical education teaching methods has the most important influence on improving young people’s interest in physical exercise, increasing the initiative of participation, and finally forming the habit of physical exercise.Figure 8
Survey respondents’ views on the significance of PE textbooks and the role of teaching methods.At present, the content setting of physical education textbooks is relatively scientific and reasonable, but some problems such as lack of interest should be paid attention to. When choosing the content of physical education teaching materials, we must try best to meet the needs of students at different levels. Young students should focus more on choosing recreational and interesting sports. In this way, it not only makes students willing to go deep into the teaching situation and maintain a happy mood, while strengthening the body, it also strengthens the desire to further participate in physical exercise. Students will unknowingly fall in love with physical exercise and then actively participate in sports activities. Physical education teachers should pay special attention to summarizing and reflecting on the experience of physical education teaching methods and explore teaching methods that can stimulate students’ enthusiasm for physical education to the greatest extent [21]. For example, when setting up some difficult sports, due to the gap of students’ abilities, the athletic talents of the students with better physical ability have been fully exerted, the learning is easier, the interest is stronger, and the initiative is naturally stronger. However, students with poor physical quality will have a strong sense of frustration because they are limited by their abilities and cannot meet or cannot meet the teaching requirements quickly, which requires physical education teachers to teach according to their aptitude. After the demonstration, the group practice method was used to group all the students according to the differences in athletic talent. It allows students whose level is roughly at the same level to be in the same group, the teachers make tours in groups, and the students in the same group communicate and discuss with each other. This will definitely create a more intense atmosphere, so all students’ interest in sports has been improved.(2) The Influence of Partners. Partnerships are a very important network of relationships as teenagers grow up. Informal groups facilitated by partnership are a common reference group when studying student behavior, and there are latent, unwritten group rules within such informal groups. This rule has a very important moderating effect on groups formed by partnership. It is mainly manifested in the indirect or direct influence on the cognition, attitude, values, aspiration level, and behavior tendency of the members of the informal group. If a group formed by a partnership has some students who are willing to participate in sports activities and are more gifted in sports, these students will especially want to show their talents in front of their partners. Over time, it will form an atmosphere of active participation in physical exercise within the group. In this way, students in this group will be driven to actively participate in physical exercise, forming a situation in which the group shares the fun brought by sports.As shown in Table4, among the 59 people who have the habit of physical exercise in this survey, 41 people, accounting for 69.5%, think that their sports interest is greatly influenced by their surrounding classmates. There are 10 people who think that they have been greatly influenced by their classmates, accounting for 16.9%, 5 people who think that they are less affected, accounting for 8.5%, and 3 people who think they are not affected, accounting for 5.1%. Among the 141 people who did not develop the habit of physical exercise, 34 people, accounting for 24.1%, believed that their interest in sports was greatly influenced by their surrounding classmates. There are 36 people who think that they have been greatly influenced by their classmates, accounting for 25.5%, 48 people who think that they are less affected, accounting for 34.1%, and 23 people who think they are not affected, accounting for 16.3%.Table 4
Questionnaire on the status of the respondents being influenced by their peers.
Very largeBiggerSmallerNo effectHave the habit of physical exerciseNumber of people411053Proportion (%)69.516.98.55.1No physical exercise habitNumber of people34364823Proportion (%)24.125.534.116.3From the data, it can be seen that due to the special physical and mental development characteristics of adolescents, they are more susceptible to the influence of their surrounding partners. Therefore, in the daily work of student management, teachers should pay attention to creating a good group public opinion atmosphere for actively participating in physical exercise among students of various natures. Because it is the response of the will of the group members, it is a very important educational factor and an important means to educate the group members.


## 4.2.3. Analysis of Family Influencing Factors

(1) Family Economic Level. As shown in Figure 9, Figure 9(a) is the comparison of the number of people, and Figure 9(b) is the comparison of the proportions. Among the 59 people with the habit of physical exercise in this survey, 13 people have a monthly household income of more than 7,000 yuan, accounting for 22.0%. There are 36 people between 4000 and 6000 yuan, accounting for 61.0%. There are 8 people between 3,000 and 4,000 yuan, accounting for 13.6%, and 2 people below 3,000 yuan, accounting for 3.4%. Among the 141 people who have not developed the habit of physical exercise, 4 people have a monthly household income of more than 7,000 yuan, accounting for 2.8%. There are 18 people between 4000 and 6000 yuan, accounting for 12.8%. There are 82 people between 3000 and 4000 yuan, accounting for 58.2%, and 37 people below 3000 yuan, accounting for 26.2%. Therefore, there is a close relationship between the economic level of the family and the development of adolescents’ physical exercise habits. The economic basis is the basis for a family to engage in all social activities. The same is true in physical exercise. A higher family economic level can provide young people with a good material basis, such as sports equipment and equipment. After these preconditions for participating in physical exercise have been paid attention to, it will make young people more pleasant and safe to do physical exercise. It has a great influence on the awakening of youth sports awareness and the enhancement of sports interest.Figure 9
The monthly household income of the surveyed adolescents.
(a)(b)(2) Parents’ Cultural Level and Educational Concept. As shown in Figure 10, among the 59 people who have the habit of physical exercise in this survey, 7 people have a college degree or above, accounting for 11.9%, and 40 people have a college degree or above, accounting for 11.9%. The proportion is 67.8%. There are 12 students whose parents are below college degree, accounting for 20.3%. Among the 141 students who did not have the habit of physical exercise, there were 4 students whose parents had college education or above, accounting for 2.8%. There are 53 people with a college degree or above, accounting for 37.6%, and 84 people with parents below college education, accounting for 59.6%. Therefore, it can be seen that the higher the educational level of the parents, the more likely the teenagers will develop the habit of physical exercise. The reason for this connection is that people are influenced by family education throughout their life. Among them, parents’ understanding of the meaning of sports will gradually affect their children’s family life. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 50 people, accounting for 84.7%, believe that physical activities can promote the learning of cultural lessons. There are 6 people who think that physical exercise has nothing to do with the study of culture class, accounting for 10.2%, and 3 people who think that it will affect the study of culture class, accounting for 5.1%. Among the 141 people who did not have the habit of physical exercise, 112 of them believed that physical exercise would affect the learning of cultural lessons. Its proportion is 79.4%, 24 people think that it has nothing to do with the study of culture class, accounting for 17.0%, and 5 people think that it will promote the study of culture class, accounting for 3.5%. Therefore, it can be inferred that it is due to differences in parental education concepts. Some parents who believe that students should be promoted in an all-round way realize that physical exercise plays a huge role in promoting the healthy growth of children and the coordinated development of body and mind. Therefore, it will actively guide young people to learn sports culture knowledge, such as sports event reports through the Internet, newspapers, and other news media, to enhance children’s understanding of sports.Figure 10
Parental education level, educational concept, and adolescent physical exercise behavior.The higher the educational level of the parents, the more extensive the knowledge they dabble in, so they are more likely to realize the importance of physical exercise to the healthy growth of young people. In their daily life, they will often introduce them to the knowledge of physical exercise and will guide young people to learn preliminary sports techniques [22]. And it is full of the wisdom of the whole family and strives to devote itself to physical exercise activities, so as to normalize family physical activities. If things go on like this, children will gradually fall in love with sports and have a strong interest.In order to expand their children’s knowledge, many parents often buy various extracurricular reading materials and school textbooks for their children. They are basically English, mathematics, Chinese, or other books that develop intelligence, but parents rarely buy newspapers and magazines related to sports. Some parents seldom read or read newspapers because of their work characteristics. It has less exposure to sports-related news media, resulting in a lack of awareness of the meaning of sports. There are also some parents who know that a healthy body is a prerequisite for teenagers to better learn cultural knowledge. However, the way they keep students healthy is not by participating in sports activities, but by purchasing various nutritional supplements for their children. It allows children to stay at home and “wasting no time” to achieve the goal of “health.” In addition, although some parents have gradually realized the value of physical exercise and increased relevant educational investment, most of them are still at the stage of “learning performance-based.” They think their child’s body is inherently better. After students complete their learning tasks, use sports as a simple relaxation and just play casually. The situations all reflect that some parents have great cognitive misunderstandings in their educational concepts.


## 4.2.4. Analysis of Social Influence Factors

(1) Community Venue Equipment and Community Outreach. In recent years, the investment in community sports facilities has increased year by year, and the status of sports equipment and facilities within the community has also received great attention. This makes it possible for people to participate in physical exercise in the community. However, while the community sports facilities are constantly being improved, we still need to face a severe situation—the current hardware conditions such as community sports facilities are far from meeting the current stage. The development needs of community sports in my country. Even some of the most basic and simple facilities, such as open spaces and other venues, are far from meeting the basic sports requirements of community residents. The status quo of such hardware facilities is in great contrast to the rapidly growing community sports crowd in our country. As a result, some residents who intend to participate in sports have to give up participating in sports because of the shortage of community sports hardware facilities. That will naturally include some teenagers. The sports hardware facilities in the community are an effective supplement to the school sports equipment and enrich the ways for young people to participate in physical exercise.As shown in Figure11, among the 59 people with physical exercise habits in this survey, 15 people think that the community sports venues are very complete, accounting for 25.4%, and 34 people think they are relatively complete, accounting for 25.4%. The proportion is 57.6%, and there are 10 people who think it is relatively small, accounting for 17.0%. Among the 141 people who have not formed physical exercise habits, 6 people think that the community sports venues are very complete, accounting for 4.3%, and 26 people think that they are relatively complete, accounting for 18.4%. There are 109 people with less equipment, accounting for 77.3%. On the other hand, among the 59 people who have the habit of physical exercise in this survey, 18 people in their community vigorously promote physical exercise, accounting for 30.5%. There are 26 people who occasionally advertise, accounting for 44.1%, and 15 people who never advertise, accounting for 25.4%. Among the 141 people who did not have the habit of physical exercise, 12 people in their community vigorously promoted physical exercise, accounting for 8.5%. There are 46 people who advertise occasionally, accounting for 32.6%, and 83 people who never advertise physical exercise, accounting for 58.9%.Figure 11
The relationship between the equipment of community sports venues, sports publicity, and youth physical exercise habits.It can be seen that the sports venues and equipment in the community have a certain influence on the formation of adolescents’ physical exercise habits. Therefore, all walks of life must recognize the positive impact of the configuration of community sports venues on the behavior and habits of young people’s physical exercise and attach importance to the placement of community sports venues. On the other hand, the development of sports publicity work in the community has a certain influence on the formation of adolescents’ physical exercise habits. The reason is that vigorously publicizing knowledge about physical exercise in the community will enhance community residents’ understanding of related knowledge about physical exercise, form a community sports boom, and create a boom for everyone to participate in physical exercise. In this good sports environment, community residents, especially teenagers, will have herd behavior. If things go on like this, young people will feel the pleasure brought by physical exercise, and the simple behavior of conformity will gradually be internalized into the habit of physical exercise. Therefore, the community should pay attention to increasing the publicity of sports knowledge in the community.


## 4.3. Conclusion

Individual factors such as age, gender, interest in sports, and individual physical fitness can affect the formation of adolescents’ physical exercise habits. However, in reality, the individual factors of adolescents are often ignored, and they fail to reflect their dominant position in participating in physical exercise activities. They only passively engage in physical activities and fail to achieve the set goals.School education factors such as textbook content, teaching methods, and partners play an important role in the formation of adolescents’ physical exercise habits. In reality, in the process of promoting young people’s physical exercise habits, although some school education factors have received initial attention, they only remain at a very superficial level. And it did not form an effective close-knit system.Family education factors such as family income level, parental education level, and parental concept also affect the formation of physical exercise habits. At present, some parents have different degrees of cognitive biases on physical exercise, and they do not realize the important role of family education in the process of cultivating adolescents’ physical exercise habits.Social factors such as community venue equipment and community publicity are also necessary conditions for the formation of young people’s physical exercise habits. At present, the cultivation of young people’s physical exercise habits has not received attention from all walks of life, and there are problems such as lack of community sports venues and insufficient community sports publicity.


## 5. Discussion

First of all, through the study of relevant knowledge points of literature works, this paper initially masters the relevant basic knowledge and analyzes how to conduct research on the factors related to adolescent physical exercise behavior data based on the artificial neural network model. This paper expounds the artificial neural network and focuses on the BP neural network. This paper explores the BP neural network model and learning algorithm and analyzes the related factors of adolescent physical exercise behavior through experiments.This paper focuses on the BP neural network. It is a multilayer neural network that is trained using an error propagation algorithm. The BP neural network has strong nonlinear mapping ability and can store a large number of input-output mapping relationships in the learning process, without prespecifying the function describing this relationship. The BP neural network has a wide range of applications in sports research and practice [23].Through experimental analysis, this paper shows that there are many factors that affect the physical and healthy exercise of young people. There are from oneself, such as age, gender, interest in sports, and individual physical fitness. There are influences from the school, such as teaching material content, teaching methods, and partners. There are family education factors such as family income level, parental education level, and parental concept. In addition, social factors such as community venue equipment and community publicity also play an important role in the process of youth physical exercise behavior.


## 6. Conclusion

The influencing factor of adolescents’ physical exercise behavior is a diverse and complex system. As far as school and family factors are concerned, it covers both promoting factors and restricting factors. Physical inactivity affects adolescent bone development and functional health, increasing the incidence of overweight, obesity, and a range of noncommunicable chronic diseases. This paper is based on the artificial neural network model and only selects the variables with certain representativeness and high attention among many factors for analysis and discussion. It may not fully reveal the impact mechanism of adolescent physical exercise behavior. In the future, multivariable comprehensive consideration should be added, taking into account the positive and negative factors of youth physical exercise, and striving to make the promotion path of youth physical exercise more comprehensive, detailed, and specific.



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*Source: 3406831-2022-05-24.xml*