This is the general rule but there are exceptions.

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Technique Stride length is also a natural aspect of an athlete's make-up. Although it is one area difficult to improve on, it can be done. The frequency of stride is a little easier to change. This refers to the rate of leg and arm movement as you run.  Pure Testo Xplode Biomechanics which is the study of an athlete's movement will help to determine these factors. Improving your technique will eliminate wasted movements and energy. This will help you to train and perform more economically which will directly lead to improved performance.For many 100 metre sprinters the winner is the athlete who slows down the least. Power is one of the essential elements to speed.Agility: In order to be fast an athlete must also be agile. The ability to change directions fast, speed up and slow down all contribute to the speed of an athlete. The key factors that can influence how agile an athlete is are balance and coordination.Reflex or Reaction Speed:  http://www.strongmenmuscle.com/pure-testo-xplode/