Fatigue Warning System During Physical Exercise Based on Heart Rate and Oxygen Saturation Using Non-invasive Wearable Sensor

This paper presents the fatigue warning system based on heart rate and oxygen saturation monitoring using a non-invasive wearable sensor on the android platform. This study aims to provide an early warning in anticipation of fatigue in real-time during physical exercise. An algorithm to define the level of fatigue when physical exercise is provided in this study. A non-invasive wearable sensor located on the wrist is used to detect the user's heart rate and oxygen saturation and monitor them on the android applications. The user's family gets the notifications and the user's locations when the system detects the indications of the user's fatigue during the physical exercise. The testing is done by jogging on the treadmill under the scenario variations of age, running speed, and running duration to see the effect of physical activity on the heart rates and oxygen saturation. The experiments show heart rate detection, and oxygen saturation accuracies are 93.3% and 91.9%, respectively. The android application warns when the user's heart rate and oxygen saturation are under abnormal conditions. The user's age, running speed, and exercise duration affect the heart rate and oxygen saturation during jogging. The user feels fatigued when reaching above 80% of maximum heart rate and oxygen saturation level under 95%.