cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.20017474.v1
title: Electromyographic reaction time in older female fallers and non-fallers after postural perturbation

description: The electromyographic reaction time (ERT) reflects the magnitude and speed with which muscles are activated to perform movements, to prevent injuries, or to position a joint. This parameter can be used to analyze postural control performance after an external perturbation and can be correlated with the possibility of falls in older adults. The objective of this study was to determine the ERT of the internal oblique, rectus femoris, vastus lateralis, tibialis anterior, multifidus, gluteus maximus, biceps femoris, and lateral gastrocnemius muscles to balance threats in older adults with and without a history of falls. Twenty-nine physically active and noninstitutionalized women aged 60 years or older were divided into two groups: fallers (n=13; 72.4 ± 8.0 years) and non-fallers (n=16; 67.8 ± 6.8 years). The ERT of the muscles tested did not differ significantly between groups following forward or backward perturbations. The results suggest that the activation of the muscles tested in response to forward or backward perturbations is not a determinant factor of falls
DOI: 10.6084/m9.figshare.20017477
title: Determinant factors of efficiency when the Counter Movement Jump is performed in acute fatigue

description: This work analysed the changes that occur in kinetic-temporal parameters and the electromyographic activity of lower limb muscles during the performance of maximum Counter Movement Jumps (CMJ) done with and without muscular fatigue, to explain the changes in performance in both situations. The vertical strength of fifty jumps performed by ten male sportsmen before and after a fatigue protocol was registered. Records of surface electromyography were obtained for six lower limb muscles; in addition, activation level and intermuscular coordination were analysed. For analysis purposes, negative and positive mechanic working times were considered separately. In both conditions, the temporal course of strength distribution is more important for the performance than any other instantaneous parameter. The negative external working time was significantly lower in fatigue conditions. The electromyographic analysis showed an increase in the activation level of all muscles studied and significant changes in the activation sequence. The specific kinetic-temporal variables were not good predictors of jump height. When CMJ is performed without muscle fatigue, a high value of active state favours the positive work. During fatigue, there could be a partial compensation of the performance due to the increasing activity of the contractile elements, although the activation sequence undergoes significant changes. Thus, the changes in performance would be mainly associated with the decrease in the capacity to transmit power in the proximal-distal direction.
DOI: 10.6084/m9.figshare.20017479
title: Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups

description: The aim of this study was to evaluate force, rate of force development and knee extensor neuromuscular efficiency asymmetries in children, adults and elderly. Each subject performed maximal isometric voluntary contractions (MIVC) and submaximal trials (15% and 30% MIVC). Maximal force, rate of force development (RFD) and neuromuscular efficiency were evaluated and compared between groups and between preferred and non-preferred lower limb. Children (mean age 8.4, SD 0.7 yrs), female adults (mean age 23.2, SD 3.5 yrs) and elderly (mean age 65.9 SD 7.0 yrs) were evaluated. RFD was higher in young adults, and similar between children and elderly. Neuromuscular efficiency decreased significantly with aging (P&lt;0.05). Inter-limb asymmetries were observed for force and RFD in favor of the preferred lower limb in the elderly (P&lt;0.05). Force and RFD asymmetries in the elderly are supported by the right hemisphere-aging model contributing to increased motor asymmetries. It was suggested that both physical assessment and training in the elderly should consider asymmetries that apparently are inherent to the aging process. A simple protocol for maximal and submaximal force assessment may be useful for delineating impairments in force and power in the elderly.
DOI: 10.6084/m9.figshare.20017479.v1
title: Isometric muscle force, rate of force development and knee extensor neuromuscular efficiency asymmetries at different age groups

description: The aim of this study was to evaluate force, rate of force development and knee extensor neuromuscular efficiency asymmetries in children, adults and elderly. Each subject performed maximal isometric voluntary contractions (MIVC) and submaximal trials (15% and 30% MIVC). Maximal force, rate of force development (RFD) and neuromuscular efficiency were evaluated and compared between groups and between preferred and non-preferred lower limb. Children (mean age 8.4, SD 0.7 yrs), female adults (mean age 23.2, SD 3.5 yrs) and elderly (mean age 65.9 SD 7.0 yrs) were evaluated. RFD was higher in young adults, and similar between children and elderly. Neuromuscular efficiency decreased significantly with aging (P&lt;0.05). Inter-limb asymmetries were observed for force and RFD in favor of the preferred lower limb in the elderly (P&lt;0.05). Force and RFD asymmetries in the elderly are supported by the right hemisphere-aging model contributing to increased motor asymmetries. It was suggested that both physical assessment and training in the elderly should consider asymmetries that apparently are inherent to the aging process. A simple protocol for maximal and submaximal force assessment may be useful for delineating impairments in force and power in the elderly.
DOI: 10.6084/m9.figshare.20017480
title: Effect of exercise order on the resistance training performance during a circuit training session

description: The aim of this study was to compare total work volume, number of repetitions and rate of perceived effort performed in two different sequences of circuit training sessions. Eleven recreationally trained men (24.0 ± 4.8 years, 76.1 ± 8.5 kg, 1.75 ± 0.06 m) performed two different sequences of circuit training sessions. All sessions consisted of eight stations (exercises) of three sets in circuit, performed to volitional fatigue, alternating upper and lower body exercises, with 1-minute rest interval between exercises. Sequence A began with multiple joint exercises and progressed to single joint exercises, whereas sequence B was performed with the opposite exercise order. Number of repetitions and rating of perceived exertion (RPE) were compared by repeated measures multivariate analysis of variance (repeated measures MANOVA). Total work volume (TWV) was compared by paired t-test. There were no differences between exercise order for TWV (p=0.47) and RPE of all exercises (p&gt;0.05). For both sequences, number of repetitions was greater when exercise was performed first (p&lt;0.05). These results indicate that during a circuit training session, exercises order influenced the number of repetition, but did not influence TWV and RPE. These findings may suggest that for those who aim overall muscular gains, similar results will be obtained with single and multiple joint, upper and lower body circuit training exercise orders. Similarly, exercise intensity will be similarly perceived regardless of exercise sequences. For those who aim specific muscle group gains, priority exercises must be performed first.
DOI: 10.6084/m9.figshare.20017480.v1
title: Effect of exercise order on the resistance training performance during a circuit training session

description: The aim of this study was to compare total work volume, number of repetitions and rate of perceived effort performed in two different sequences of circuit training sessions. Eleven recreationally trained men (24.0 ± 4.8 years, 76.1 ± 8.5 kg, 1.75 ± 0.06 m) performed two different sequences of circuit training sessions. All sessions consisted of eight stations (exercises) of three sets in circuit, performed to volitional fatigue, alternating upper and lower body exercises, with 1-minute rest interval between exercises. Sequence A began with multiple joint exercises and progressed to single joint exercises, whereas sequence B was performed with the opposite exercise order. Number of repetitions and rating of perceived exertion (RPE) were compared by repeated measures multivariate analysis of variance (repeated measures MANOVA). Total work volume (TWV) was compared by paired t-test. There were no differences between exercise order for TWV (p=0.47) and RPE of all exercises (p&gt;0.05). For both sequences, number of repetitions was greater when exercise was performed first (p&lt;0.05). These results indicate that during a circuit training session, exercises order influenced the number of repetition, but did not influence TWV and RPE. These findings may suggest that for those who aim overall muscular gains, similar results will be obtained with single and multiple joint, upper and lower body circuit training exercise orders. Similarly, exercise intensity will be similarly perceived regardless of exercise sequences. For those who aim specific muscle group gains, priority exercises must be performed first.
DOI: 10.6084/m9.figshare.19829476.v1
title: A consistent data model for different data granularity in control charts

description: After a long-running show was canceled, control charts are used to identify if and when viewing drops. The finest granularity daily viewing has high autocorrelation and control charts use residuals from a seasonal ARIMA model. For coarse granularity data (weekly and monthly viewing) an approximate AR model is derived to be consistent with the finest granularity model. With the proposed approach, a longer memory model is used in the granular data control charts that reduces the number of false alarms from control charts constructed treating granular data as a different measurement.
DOI: 10.6084/m9.figshare.19719328
title: Multivariate Six Sigma: A case study in an outpatient pharmaceutical care unit

description: Six Sigma strategies for process improvement are widely used in industry and manufacturing. The spreading tendency to gather process data about hospital activity is leading to an increase of process improvement projects in the healthcare context. The complexity of these databases requires upgrading the classical statistical Six Sigma toolkit. In this paper we present a Six Sigma project carried out in an Outpatient Pharmaceutical Care Unit at Hospital Universitario Doctor Peset in Valencia (Spain), where we illustrate the benefits of using latent variables-based models, specifically Partial Least Squares Regression (PLS), integrating them into the DMAIC phases of the project.
DOI: 10.6084/m9.figshare.19719328.v1
title: Multivariate Six Sigma: A case study in an outpatient pharmaceutical care unit

description: Six Sigma strategies for process improvement are widely used in industry and manufacturing. The spreading tendency to gather process data about hospital activity is leading to an increase of process improvement projects in the healthcare context. The complexity of these databases requires upgrading the classical statistical Six Sigma toolkit. In this paper we present a Six Sigma project carried out in an Outpatient Pharmaceutical Care Unit at Hospital Universitario Doctor Peset in Valencia (Spain), where we illustrate the benefits of using latent variables-based models, specifically Partial Least Squares Regression (PLS), integrating them into the DMAIC phases of the project.
DOI: 10.6084/m9.figshare.19829476
title: A consistent data model for different data granularity in control charts

description: After a long-running show was canceled, control charts are used to identify if and when viewing drops. The finest granularity daily viewing has high autocorrelation and control charts use residuals from a seasonal ARIMA model. For coarse granularity data (weekly and monthly viewing) an approximate AR model is derived to be consistent with the finest granularity model. With the proposed approach, a longer memory model is used in the granular data control charts that reduces the number of false alarms from control charts constructed treating granular data as a different measurement.
DOI: 10.6084/m9.figshare.20017482.v1
title: Walking for leisure and commuting and association with socioeconomic factors and perceived environment in adults

description: This study aimed to analyze the association between walking for leisure and commuting and the perceived environment in adults living in Rio Claro, São Paulo, Brazil. A cross-sectional household-based study was conducted with 470 adults (45.7±17.8 years). Subjects responded to the International Physical Activity Questionnaire (long version) and to an adapted version of the Neighborhood Environmental Walkability Scale, which was used to evaluate the perceived built and social environments. Data analysis was performed using logistic regression. The outcome was walking ≥10minutes/week for leisure or commuting. The prevalence of participants who regularly walked ranged from 20.6% (walking for leisure) to 58.9% (walking for commuting). The prevalence of walking for commuting was higher in women than in men (66.3% and 50.0%, respectively), and walking for leisure was more common among men (21.7% when compared to 19.8% of women). Walking for commuting was associated with the female sex, lower economic classes (C, D, and E), and perceived availability of crosswalks. Walking for leisure was associated with the following individual and environmental variables: age (60 years or above), social class (B2, C, D, and E), invitations by friends and/or neighbors for walking. The results demonstrate that there is an association between perceived environment and walking for leisure or commuting.
DOI: 10.6084/m9.figshare.20017482
title: Walking for leisure and commuting and association with socioeconomic factors and perceived environment in adults

description: This study aimed to analyze the association between walking for leisure and commuting and the perceived environment in adults living in Rio Claro, São Paulo, Brazil. A cross-sectional household-based study was conducted with 470 adults (45.7±17.8 years). Subjects responded to the International Physical Activity Questionnaire (long version) and to an adapted version of the Neighborhood Environmental Walkability Scale, which was used to evaluate the perceived built and social environments. Data analysis was performed using logistic regression. The outcome was walking ≥10minutes/week for leisure or commuting. The prevalence of participants who regularly walked ranged from 20.6% (walking for leisure) to 58.9% (walking for commuting). The prevalence of walking for commuting was higher in women than in men (66.3% and 50.0%, respectively), and walking for leisure was more common among men (21.7% when compared to 19.8% of women). Walking for commuting was associated with the female sex, lower economic classes (C, D, and E), and perceived availability of crosswalks. Walking for leisure was associated with the following individual and environmental variables: age (60 years or above), social class (B2, C, D, and E), invitations by friends and/or neighbors for walking. The results demonstrate that there is an association between perceived environment and walking for leisure or commuting.
DOI: 10.6084/m9.figshare.20017483
title: Association between leisure-time physical activity and long-term medication use in adults from a low socioeconomic region

description: Few studies have investigated the association between leisure-time physical activity and long-term medication use in Brazilian populations, especially those of low socioeconomic status. The objective of this study was to analyze the association between the need for long-term medication and leisure-time physical activity in adults from the Ermelino Matarazzo district, a low-income region in São Paulo, Brazil. A population-based cross-sectional study was conducted in 2007 and involved 890 subjects aged 18 years or older. Data regarding the need for long-term medication and types of medications used were collected using a questionnaire. Leisure-time physical activity was measured using the long version of the International Physical Activity Questionnaire. Descriptive analysis, chi-square test, and simple and multiple binary and multinomial logistic regression analysis were used. Among the subjects studied, 29.2% reported the need for long-term medication and 10% required at least two different types of medications. After adjustment for gender, age, education level and Body Mass Index, subjects who did not perform at least 150 min/week of leisure-time physical activity presented 2.78 (95% confidence interval - 95%CI: 1.45; 5.30) and 4.69 (95%CI: 1.90; 11.53) times the odds of requiring long-term medication and two or more types of medications rather than none, respectively, than those who did. Broader discussion of the interaction between medication, leisure-time physical activity and social and economic aspects is needed to reduce inequalities and to improve the health of individuals of low socioeconomic status.
DOI: 10.6084/m9.figshare.20017483.v1
title: Association between leisure-time physical activity and long-term medication use in adults from a low socioeconomic region

description: Few studies have investigated the association between leisure-time physical activity and long-term medication use in Brazilian populations, especially those of low socioeconomic status. The objective of this study was to analyze the association between the need for long-term medication and leisure-time physical activity in adults from the Ermelino Matarazzo district, a low-income region in São Paulo, Brazil. A population-based cross-sectional study was conducted in 2007 and involved 890 subjects aged 18 years or older. Data regarding the need for long-term medication and types of medications used were collected using a questionnaire. Leisure-time physical activity was measured using the long version of the International Physical Activity Questionnaire. Descriptive analysis, chi-square test, and simple and multiple binary and multinomial logistic regression analysis were used. Among the subjects studied, 29.2% reported the need for long-term medication and 10% required at least two different types of medications. After adjustment for gender, age, education level and Body Mass Index, subjects who did not perform at least 150 min/week of leisure-time physical activity presented 2.78 (95% confidence interval - 95%CI: 1.45; 5.30) and 4.69 (95%CI: 1.90; 11.53) times the odds of requiring long-term medication and two or more types of medications rather than none, respectively, than those who did. Broader discussion of the interaction between medication, leisure-time physical activity and social and economic aspects is needed to reduce inequalities and to improve the health of individuals of low socioeconomic status.
DOI: 10.6084/m9.figshare.20017486
title: The "Timed Up and Go" in the prediction and explanation of falls in old people practicing physical exercises

description: The classic and cognitive "Timed Up and Go" tests (TUG) are used to identify old people prone to falls, but we were unable to find studies that prove their association in old people practicing physical exercise. The objective of this study was to analyze the classic and cognitive versions of TUG in forecasting and explaining the occurrence of falls in old people practicing physical exercise. Participants included 82 physically active old people. Data were collected on the occurrence of falls in the past 12 months among those who performed the classic and the cognitive TUG tests through the pronunciation of animals while performing the test. We used descriptive and inferential statistics with a significance level of 5%. A binary logistic regression was performed to associate the outcome (falls) and the performance in the tests. To identify the predictive values, the ROC Curve was used. The occurrence of falls in the sample was 19.5%. There was a significant difference between the values obtained in the TUG classic and cognitive tests (9.0 ± 1.9 and 10.0 ± 2.2 seconds, respectively). There was no difference between the old people with and without a history of falls in both tests, despite the averages being higher in old people with a history. In the logistic regression analysis, the performance of both versions did not explain the occurrence of falls. In the ROC curve, the TUG classic test showed an accuracy of 65.3% (p= 0.058) and the TUG cognitive test of 58.1% (p= 0.324). The TUG classic and cognitive tests did not correlate with the occurrence of falls and should be used with caution for predicting falls in old people practicing physical exercise.
DOI: 10.6084/m9.figshare.20017486.v1
title: The "Timed Up and Go" in the prediction and explanation of falls in old people practicing physical exercises

description: The classic and cognitive "Timed Up and Go" tests (TUG) are used to identify old people prone to falls, but we were unable to find studies that prove their association in old people practicing physical exercise. The objective of this study was to analyze the classic and cognitive versions of TUG in forecasting and explaining the occurrence of falls in old people practicing physical exercise. Participants included 82 physically active old people. Data were collected on the occurrence of falls in the past 12 months among those who performed the classic and the cognitive TUG tests through the pronunciation of animals while performing the test. We used descriptive and inferential statistics with a significance level of 5%. A binary logistic regression was performed to associate the outcome (falls) and the performance in the tests. To identify the predictive values, the ROC Curve was used. The occurrence of falls in the sample was 19.5%. There was a significant difference between the values obtained in the TUG classic and cognitive tests (9.0 ± 1.9 and 10.0 ± 2.2 seconds, respectively). There was no difference between the old people with and without a history of falls in both tests, despite the averages being higher in old people with a history. In the logistic regression analysis, the performance of both versions did not explain the occurrence of falls. In the ROC curve, the TUG classic test showed an accuracy of 65.3% (p= 0.058) and the TUG cognitive test of 58.1% (p= 0.324). The TUG classic and cognitive tests did not correlate with the occurrence of falls and should be used with caution for predicting falls in old people practicing physical exercise.
DOI: 10.6084/m9.figshare.20017488
title: Analysis of localized muscle fatigue in elderly women with and without a history of falls using electromyographic signal frequency parameters

description: One of the problems that most concerns the elderly population is the falling, which can be caused by muscle fatigue. The objective of this study was to compare median electromyographic frequency values for the vastus lateralis muscle and the lateral portion of the gastrocnemius muscle (as parameters of electromyographic fatigue) in elderly people with and without a history of falls. A total of 20 healthy, physically active, elderly women who had or had not suffered falls were enrolled on the study. Median electromyographic signal frequencies were analyzed for the vastus lateralis muscle and the lateral portion of the gastrocnemius muscle in isometric contraction. ANOVA and Student's t test were used for comparisons, to a cutoff of p ≤ 0.05. Median frequencies for the gastrocnemius and vastus lateralis muscles were both higher in the group with a history of falling, but without statistical significance. It was also observed that the rate of decline in median frequency was greater in the group with a history of falling. It can be concluded that elderly people with a history of falling have a greater tendency to fatigue of the gastrocnemius and vastus lateralis muscles than their peers with no history of falling.