This article deals with the influence of physiological stress on the physiological status of a person. Firstly, the quantity of the protein should be consumed for construction of the human body. Secondly, where and how appears a natural quality of "force". The textbooks for physical education, the theory of sports provides a definition of the physical quality of the "force." The book on biochemistry presents mechanism of muscle contraction. Experts in the field of physical culture have little knowledge in this matter. Third, parents (some of whom have degrees) often turn to our chair of weightlifting, requiring the prohibition of classes with weights, because they believe these activities negatively affect the growth of a teenager.
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