Recovery — If stressed properly, your body will recover in a better state than it was before. Rest too little, and you're not adapting fully to the stress. Rest too much, and you begin to loose the adaptations you've made. The amount of rest you need is specific to your individual body, at that time, given the amount and kind of training. Recovery entails sleep, relaxation, low stress, proper diet and hydration, and minimizing use of the just-trained muscles.