Being active makes a person healthy and strong. It is not just for people who have a weight problem but for everyone who likes to stay fit. There is a lot a person can do such jog or walk every morning, play basketball or any other sport with friends but if a person wants to have muscles and look lean, then one can sign up and workout in a gym.
People workout for 3 reasons:
The first is that the person is overweight and the only way to lose those extra pounds will be to reduce ones calorie intake and at the same time workout in the gym.