| With the intensifying competition,trainers and sportmen pay more attention to the sports equip in their training and contest,especially choosing and using the skintight equip. The skin tight equip,as the research hot spot of sports field ,can reduce the air resistance and enhance the expressive ability in sports. Therefore this research observes the experimental data changing analysis between the AEMG, MPF and fatigue ratio in different moving mode, angular velocity condition during different skintight equip by the uniform velocity and technique of electromyogram. It can increase a new experimental fact, offer new theory evidence for the further study and scientific technical suggestion for sportsmen's using the skintight ,even provide referenced relevant idea.By the Contrex instrument and ME6000 synchronous operation, the study goes on the comparative analysis to the flexor and extensor muscles of the knee joint in the concentic and eccentric contraction mode .It includes average electromyography, mean power frequency and the fatigue ratio in 30°/s,60°/s,180°/s angular velocity in different moving mode. The following conclusions come out : in the concentic mode the average electromyography increases with the growth of the tightness. There is significant difference about MPF only in 30°/s velocity, fatigue ratio decreases with the growth of the tightness. Besides it exists significant only in 180°/s angular velocity.In eccentric contraction mode, There is significant difference about MPF only in 60°/s velocity, fatigue ratio decreases with the growth of the tightness,but no significant difference.Research shows: the skintight equip can enhance the activation level and reduce vibration frequency to some degrees. At the same time it takes the positive part in relieving muscle's fatigue in a certain extent,especially more clearly in the quick movement of our body. Consequently sportmen should choose the right tightness during their athletic training and competition.
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