It is not a question anymore of why is it necessary to have a strong and healthy body, it is a question of how we are going to sustain a healthy body. Generally, we know the benefits of having a healthy body, however many of us don't know how to sustain a healthy body. This is actually the true challenge, and once you are able to master the concept of keeping your body fit, you'll be able to fight any physical, mental and emotional disability better than the others.