Wearable devices are electronic devices that are worn on the body, typically as accessories or clothing items. These devices are equipped with sensors and advanced technologies that can track and monitor various aspects of a user's health and fitness, such as heart rate, steps taken, calorie burn, and sleep patterns. Wearable devices can also provide notifications, alerts, and access to information and communication tools, making them a convenient and integrated part of daily life. As technology continues to advance, wearable devices are becoming increasingly sophisticated and specialized, offering features such as GPS tracking, blood pressure monitoring, and even ECG capabilities. This research area focuses on the development, design, and usability of wearable devices in order to help improve health and fitness outcomes and enhance overall quality of life.