“After physical activity， your heart is still beating faster than normal， your body temperature is higher and your blood vessels are dilated，” write the health experts at the American Heart Association. “This means if you stop too fast， you could pass out or feel sick. A cool-down after physical activity allows a gradual decrease at the end of the episode.”
19. Kiisa Nishikawa 1 ， Samrat Dutta 2 ， Michael DuVall 2 3 ， Brent Nelson 4 ， Matthew J Gage 5 ， Jenna A Monroy 6.Calcium-dependent titin-thin filament interactions in muscle: observations and theory.J Muscle Res Cell Motil. 2020 Mar;
