Question

why do people start feeling heavily when they are playing sports​

Answer 1

Answer:

Physical activity has been shown to stimulate chemicals in the brain that make you feel better. So playing sport regularly improves children's overall emotional wellbeing. Research shows there's a link between playing sport and self-esteem in children.

Answer 2

Answer:

Two factors make your muscles feel heavy and tired: a lack of stored muscle sugar, known as glycogen, which fuels muscles during exercise, and damage to microscopic muscle fibers. Muscles fill up with glycogen much faster when they are rested than when they are casually exercised.

Explanation:

Hope this may help you....