The purpose of the research was to reveal the features of the intensity of metabolism at athletes of different specializations and unexercised persons, as one of the kinds of markers of development of a long-term adaptation to specific kinds of sports activity. As a result of researches it was found out: 1. The multy directional changes of activity of the general lactate dehydrogenase in the blood serum after the performance of short-term physical load. In groups of thaekwon-do athletes and track and field athletics the reduction of activity of the this enzyme, and in groups of weightlifters and control group the increase was marked. 2. The authentic reduction of activity general creatine phosphokinase after performance of physical loading is registered in all researched groups of athletes and unexercised persons. 3. The authentic increase of activity of creatine phosphokinase of cordial fraction in blood serum after performance of physical loading in 40 knee-bends was revealed in all researched groups of persons .
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