The US government has issued new guidelines for the optimal amount of physical activity needed to remain healthy, suggesting that 3-5 year olds should be active for at least 3 hours per day, 6-17 year olds should be active for at least one hour, and adults should reduce sedentary behavior.

See the source article by following the link below:
The US government has issued new guidelines for the optimal amount of physical activity needed to remain healthy, suggesting that 3-5 year olds should be active for at least 3 hours per day, 6-17 year olds should be active for at least one hour, and adults should reduce sedentary behavior.