The Impact of the Difference of Futsal Frequency towards Physical Stress in Adolescent

Futsal sports have high explosive characteristics with moderate-heavy intensity. The increase of cortisol is a biomarker for high-stress situations desirable throughout futsal—that catabolic hormone secreted in a state of physical or psychological stress. Meanwhile, a person's emotions are harmful, such as stress, anxiety, fear, and frustration. The release of the cortisol hormone can activate the sympathetic nervous system, distinguished by an increase in heart rate, and reduce the ability to think and react. Additionally, it represents a role in decreasing mood and muscle fatigue. This study's persistence was to determine the differences in the frequency of futsal practice on physical stress in adolescents (27 boys). This investigation approach is an experimental study in adolescents (13,63±0,84 years old) who perform futsal sports with different futsal frequency groups for ten weeks, specifically 1-time weekly exercise frequency (F1), 3-times weekly exercise frequency (F3), and 5-times weekly exercise frequency (F5). This research had passed the research ethics review issued. The testing results on F1 found no significant improvement in cortisol (51,21±22,66 vs. 61,02±27,69). In F3, there was no significant increase at the cortisol level (57,71±15,45 vs. 61,82±13,57), and in F5 group, there was a significant increase at the cortisol level (51,02±9,38 vs. 70,33±16,36). Interestingly, only the F5 group showed a significant increase at the cortisol level in this study. Anticipated F5 physically attends to be extremely high in the intensity of futsal exercise and induces fatigue and muscle damage that can stimulate an improvement in the endocrine system, constant with enhancing cortisol levels in the blood. This cortisol release can activate the sympathetic nervous system, characterized by a high pulse rate, but it can reduce the ability to think.