# Review on Wearable Technology in Sports: Concepts, Challenges and Opportunities
## 1 Introduction  
The concept of Wearable Technology (WT) has been used in various fields such as healthcare, sports, entertainment, electronics, textiles, and the defense industry for a long time [1; 2; 3; 4; 5]. Thanks to the opportunities provided by sensor and internet technology, WT has made significant progress in the last two decades and ha become devices that we frequently use in our daily lives.  
Various definitions have been proposed for the concept of WT, and it is an interdisciplinary field that involves disciplines such as engineering, healthcare, and sports. [PERSON] et al. described the concept of WT by focusing on smartwatches and stating that it encompasses numerous devices that are directly or loosely worn on a person [2]. According to [PERSON] et al., WT refers to non-invasive devices and sensors that individuals can wear on their bodies to assist in monitoring their health conditions, without requiring subcutaneous applications [5]. [PERSON] et al. defined the concept of WT as mobile electronic devices that can be comfortably worn on the user's body or attached to their clothing [6]. [PERSON] et al., stated that WT devices differ from traditional clothing and enable personalized mobile computing [4]. [PERSON] and [PERSON] emphasized that WT devices should be soft, flexible,and washable, and they should meet people's expectations of normal clothing [7]. [PERSON] et al., defined the concept of WT, which they examined as smart textiles, as fabrics with various integrated electronic components. They emphasized that this technology should meet the fundamental requirements of clothing, such as comfort, lightweight, thermal insulation, and breathability [8]. The common underlying point identified in these studies, in addition to direct definitions, is that WTs should incorporate sensors, processing units, power sources, and be wearable on the body. It is observed in some review papers that various sports equipment are also considered as wearable [3; 9]; however, these are not actually wearable on the body and fall into the category of smart equipment, such as a smartphone or remote control device. From this perspective, it is crucial to define the boundaries of wearability clearly. Taking the above definitions together, WT can be described as devices that are worn on the body, non-invasive, and incorporate various electronic components such as sensors, communication units, processors, actuators, and power sources.  
WT is revolutionizing sports by providing real-time data for athletes to improve training, enabling coaches to tailor strategies, and providing insights for the sports industry. This article explores the potential of WT in sports, highlighting its potential to enhance athletic prowess, enhance safety, and provide more engaging sports experiences for fans and stakeholders. The article aims to pave the way for future research in this dynamic field, highlighting the potential of WT in addressing various challenges in the sports industry. The aim of this article is to review the concept of WT in the field of sports, its components, applications, academic research conducted in this area, and highlight the challenges and future directions. The method followed is a literature review and compilation study. A search was made in the Web of Science (WoS) database using keywords in order to examine and compile academic research on the subject. Looking at the titles of the articles, it is seen that firstly, a literature analysis was made, then information about the hardware and software components of WT was given, and then a general evaluation of the anatomical structure of WT and available commercial products was made. Then, the applications of WT in the field of sports are discussed in detail, and finally, there is a Conclusions Section 9 in which the important points of the article are summarized, the difficulties encountered are discussed and suggestions for future research are presented.