Baĭbikova L S, Beliakova I P, Karasik V E, Simonova L A, Fetisov G V
Gig Sanit. 1989 May(5):10-2.
The research specific to the changes in body functioning under the effect of various loads of cyclic character was carried out. The results thus obtained made it possible to analyze sex- and age-specific characteristics of body functional capacities of schoolchildren aged 6-15 (yearly characteristics). It was pointed out that by 13-14 years the schoolchildren, primarily girls, lost some of their adaptation capacity to physical load. The problem could be solved due to additional physical training activities aimed at the development of endurance, the trait being of primary importance for health promotion in schoolchildren.
针对各种周期性负荷作用下身体机能变化开展了相关研究。由此获得的结果使得分析6至15岁学童身体机能能力的性别和年龄特异性特征（逐年特征）成为可能。研究指出，到13至14岁时，学童，尤其是女孩，对身体负荷的适应能力有所下降。通过旨在培养耐力的额外体育锻炼活动可以解决这一问题，耐力这一特质对促进学童健康至关重要。
