Participating in physical activity at a moderate-and-vigorous-intensity-level is recommended for teenagers to advance in health benefits. However, due to the fitness differences, the amount of physical activity to reach the recommended intensity varies among teenagers. Therefore, tailoring the physical …

Running is a popular recreational sport, yet for many amateur runners it remains challenging to turn intentions into sustainable running behavior. Although the market offers a myriad of running-related devices that aim to motivate runners, these often focus on the training itself and not on overcoming …