No one can stay healthy without participating in the game. Healthy activity is must to stay healthy. Lifting weight is also a sports but who do not like to go to gym must spend some time in the playing field.
Sports which involve constant running like basketball, Soccer and Field hockey increase the strength and hit every muscle of the body specially legs. In sports like baseball and cricket constant running is not required yet running is must for these games.
Each sports also make a person sharp minded by regularly increasing his ability to observe and then react in a manner of seconds.