| Keywords |
Shouting; Anaerobic power; Heart variability; Sympathetic nerve; Parasympathetic nerve |
| Abstract |
The purpose of this study is to investigate whether shouting application conditions affects anaerobic power and autonomic nerve activity when physical education students had anaerobic power test. The 24 male subjects were divided into 4 groups (each of which was comprised of 6 subjects) according to the application conditions of shouting and participated in test with four types of crossover design. In order to find the effect of shouting application conditions on anaerobic power, one-way ANOVA was conducted. To compare interaction effects, two-way (4(Randomized Groups)×5(Repeated Measures)) ANOVA) was conducted. Tukey HSD as a post hoc method was applied just in case of the statistically significant difference in all analyses. There was no significant difference in anaerobic power according to shouting application conditions. However, the more strength shouting had, the stronger anaerobic power was.
Regarding a change in heart variability according to shouting application conditions, shouting application conditions had interaction effect with recovery time (p<.001), and there was a significant difference depending on a recovery time (p<.001). Regarding a change in autonomic nerve activity according to shouting application conditions, there was a significant difference depending on a recovery time (p<.001). Given the result, it will be necessary to conduct extended and follow-up research on nearby cheer-up (shouting pattern and volume) with no use of any devices for shouting and the influence of shouting on actual exercise performance. |