Power is the ability of the neuromuscular system to produce the greatest possible force in the shortest amount of time. Power is simply the product of muscle force(F) multiplied by velocity of movement: P=FxV. Any increase in power must be the result of improvement in either strength ,speed or a combination of both. Why do power training? The advantage of explosive, high velocity power training is that it trains the nervous system. Increases in performance can be based on neural changes that help the individual muscles achieve greater performance capbility.This is accomplished by shortening the time of motor unit recruitment,especially FT fibers, and increase the tolerance of the motor neurons to increased innervation(turning on of the muscle). To increase power it is not neccesary to pe rform many repetitions. The determining factor is speed of performance, which dictates the speed of muscle contraction. Therefore exercises should be performed only as long as quickness is possible. Repetitions must discontinue the moment speed declines.The speed and explosiveness of an exercise are guaranteed only as long as high numbers of FT fibers are involved. When they fatigue, speed decreases. Continuing an activity after speed dcelines is futile because at this point the ST fibers might be called into action,an unwanted situation for athletes and others seeking power. How do you do power training?Incorporate power training for 4-6 weeks. If your involved in cyclical sports,such as running, walking, swimming ,rowing, cycling ,canoeing or skating, the load for training should be 30-50% with a max of 60% of your max weight.For sports involving acyclical movement such as fencing ,wrestling, gymnastics ,weightlifting or football, the load should be 50-80%. A low number of repetitions is recommended since the key element for power training is how forcefully the repetitions are executed,not how many are performed.Perform the exercises explosiveley. Don't overlook saftey. When a limb extends it should not be snapped but performed as smoothly as possible without jerking the barbell or Db's. Select the lowest number of exercises (2-4,maximum of 5) so you can perform the highest number of sets possible (3-6) for the maximum benefit of the primemovers. Rest intervals should be between 3-6 minutes. Perfrom power training no more than 2-3 times per week , taking into account your own recovery ability.Power training can help you drive the ball in golf swing,give you a more powerful backhand in tennis. or It will allow you to jump higher ,run faster, throw farther and who couldn't use that. George Carvaja l