Abstract

There are many researches of the effects of strenuous exercise on DOMS for adults have been presented. However, there are not many studies on children who have a lot of physical activity on a daily basis and are engaged in sports activities. In recent years, due to the younger age of sports competitions, practice specialized in specialized sports has been practiced since childhood. The practice in the children is similar to that of an adult, and there is a high opportunity that injury may occur. Therefore, the purpose of this study was to understand the effects of children after strenuous exercise on their bodies so that they can practice safely. Adults express DOMS regardless of gender in resistance training with eccentric muscle activity. However, even if boys and girls under the age of 15 in the developing stage perform resistance training with the same load, visual analog scale (VAS), which is an indirect index of DOMS, increases, but creatine kinase activity (CK), which is an index of muscle damage, does not increase. In addition, in uphill or downhill running due to its own weight, an increase in CK is observed in boys with high muscle mass, but not in girls with low muscle mass. Therefore, it was suggested that there may be a gender difference in the expression of DOMS that is not observed in adults, and a gender difference in the expression of DOMS in developing children.