just as your body needs regular exercise,it needs rest.while you rest your body stores the energy it will use for work and play,when you rest your body slows down and uses less energy.Resting gives your heart,other muscles,and lungs a chance to relax.After you have been active for a long time,your muscles often get tight they can feel sore.Resting helps your muscles relax.So Rest to the fullest.Chao!