A common phenomenon has begun to receive extensive attention in academia: physical activity in youth tends to decline with increasing age, while sedentary behavior including screen time increases. Therefore, the lack of physical activity in the intelligent era has brought a series of public health problems that need to be further discussed.

This Special Issue aims to systematically explore the relationship among physical activity (PA), screen time (ST) and adolescent group health from multiple dimensions of health.

Topics of interest include but are not limited to: