## 5 Discussion  
Wearable technology has dramatically transformed the sports world, revolutionizing training, performance analysis, and injury prevention. This review classifies wearable devices into three main categories: location-based wearables (LBW), biometric wearables (BMW), and performance wearables (PMW), with each providing unique insights into different aspects of athletic performance. Location-based wearables have shown significant promise in tracking athletes' movements, delivering valuable data on distance, speed, and pace. However, their accuracy can be compromised in certain environments, such as urban areas with tall buildings or dense forests, due to GPS signal interference. Additionally, the sampling rate of LBW is crucial for data quality, especially in sports that involve rapid direction or speed changes. Future research should aim to improve the accuracy of LBW in challenging environments and optimize the sampling rates for specific sports.  
\begin{table}
\begin{tabular}{l l} \hline \hline
**Existing Product** & **Application** \\ \hline \hline \multirow{2}{*}{Athos [85]} & • This smart clothing system tracks muscle activity, heart rate, and temperature. \\  & • Data can be used to improve strength training performance and prevent injuries. \\ \hline \multirow{4}{*}{Oculus Quest [86]} & • This virtual reality headset allows athletes to train and compete in \\  & • virtual environments. \\ \cline{1-1}  & • It can be used to improve skills and technique, and it can also be used for \\ \cline{1-1}  & entertainment purposes. \\ \hline \hline \multirow{2}{*}{Jabra Elite Sports [87]} & • These sweat-resistant wireless earbuds allow athletes to listen to music, stay focused, and hear their surroundings if needed. \\ \hline \multirow{2}{*}{Leomo Motion Tracking [88]} & • This technology tracks movement, acceleration, rotation, and gravity. \\ \cline{1-1}  & • It also provides real-time feedback on movement, displayed on a smartphone or tablet. \\ \hline \hline \end{tabular}
\end{table}
Table 4: Other Wearables examples.  
Biometric wearables give unprecedented access to physiological data, enabling real-time monitoring of vital signs like heart rate, blood glucose level, and blood pressure. Nevertheless, the accuracy and reliability of these measurements can vary significantly between devices and during intense physical activity. The potential for BMW to detect early signs of overtraining or fatigue is particularly promising, yet more research is needed to establish reliable biomarkers and algorithms for fatigue detection. Furthermore, continuous monitoring of physiological data raises ethical considerations and data privacy concerns that need to be addressed as the technology progresses.  
Performance wearables have demonstrated great potential in providing detailed insight into athletic techniques and biomechanics. However, their accuracy and reliability can be affected by factors such as placement, calibration, and environmental conditions. Integrating PMW data with video analysis and artificial intelligence holds significant promise for comprehensive performance assessment and technique optimization. The future of wearable technology in sports will likely be influenced by emerging technologies such as lab-on-a-chip devices, which offer potential for real-time biochemical analysis. Integrating wearable technology with virtual and augmented reality systems may revolutionize training methodologies and performance analysis. However, as the field advances, it is crucial to develop standardized protocols for data collection, analysis, and interpretation, to ensure comparability across different devices and sports.