At 60 m, the main supporting factor is speed. Therefore the speed in doing a motion is determined by various factors. Factors that affect the speed of motoris consist of strength, speed of reaction, contractions, relaxasi and coordination of muscle and explosive power limb muscles. In addition to the speed factor other supporters in the running is the power of a good limb muscles, then also required agility in motion from the above factors in this study the author just wanted to know the contribution factor in the explosive power of limb muscles with running speed, explosive power due to limb muscles play an important role in the running speed of a person.
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