Effects that we gain from strength, speed, and agility training wear off as time goes on if these abilities aren’t being challenged. The Reversibility Principle dictates that athletes lose the beneficial effects of training when they stop working out. With that being said, it also means that detraining effects can be reversed when athletes resume training. It goes with the saying, “if you don’t use it, you lose it.” Training intensity is an extremely important driver of adaptation. Throughout the off season, training intensity changes to meet a certain goal. As the season approaches, intensity is generally high and more of an emphasis is placed on speed in movements. Since the quality of power is being highly developed at this point, the stars are lined up to allow your body to do everything better from having a quicker first step after a cut on the field to swinging a bat faster and harder. Qualities such as power, strength, speed and flexibility are called training residuals. The Residual Training Effect is the retention of changes in the body state and motor abilities after the cessation of training beyond a certain time period. After training is stopped, the effects of various fitness components decrease gradually.