Exercise should be a necessity. Whether its stretching daily, walking everywhere you go, never taking the elevator and choosing the stairs or working out at the gym.
Being active will improve your health greatly. It reduces stress, cure physical injuries, add years to your life, etc. The list goes on!!
Exercise not only will make you feel better about how healthy you will began to feel, but you will have a better outlook on life.
Just remember don't over do it, be careful, and enjoy an active life!