This study aimed to clarify the immediate effect that trunk muscle exercise has on muscle reaction time, and to clarify the effect of 2-week exercise on muscle reaction time. The study showed that as for immediate eff...This study aimed to clarify the immediate effect that trunk muscle exercise has on muscle reaction time, and to clarify the effect of 2-week exercise on muscle reaction time. The study showed that as for immediate effects, the muscle reaction time was significantly shortened in the TrA/OI (transversus abdominis muscle/obliquus internus muscle) of two exercise groups. However, the immediate effect seen before the 2-week trunk muscle exercise intervention disappeared after the intervention. In addition, trunk muscle exercise intervention for 2 weeks significantly shortened the muscle reaction time of TrA/OI in one exercise group. Furthermore, shortening of the muscle reaction time was also observed in the MF (multifidus muscle) of both exercise groups. The factors affecting the muscle reaction time of TrA observed in this study were considered to be an improvement of neuromuscular function by the central nervous system. It was also considered that 2-week exercise intervention has a lower value after 2 weeks due to an improvement of neuromuscular function by the central nervous system, and an immediate effect could not be obtained with the same exercise as at the time of intervention.展开更多
The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on...The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on the Karlsson score. All participants underwent performance tests (Yo-Yo Intermittent Recovery test level 1, 20 m and 40 m Sprint, Bounding test, Shuttle run, Figure-of-8 hop test, and Side hopping). A positive relationship was observed between functional ankle instability and performance deficits on the Figure-of-8 hop test. However, functional ankle instability is thought to have an influence on football performance. In the performance tests, the results suggest the necessity of a new evaluation method with more difficult tests incorporating football movements, subjective “pain” and “instability” indices, and mechanical instability.展开更多
文摘This study aimed to clarify the immediate effect that trunk muscle exercise has on muscle reaction time, and to clarify the effect of 2-week exercise on muscle reaction time. The study showed that as for immediate effects, the muscle reaction time was significantly shortened in the TrA/OI (transversus abdominis muscle/obliquus internus muscle) of two exercise groups. However, the immediate effect seen before the 2-week trunk muscle exercise intervention disappeared after the intervention. In addition, trunk muscle exercise intervention for 2 weeks significantly shortened the muscle reaction time of TrA/OI in one exercise group. Furthermore, shortening of the muscle reaction time was also observed in the MF (multifidus muscle) of both exercise groups. The factors affecting the muscle reaction time of TrA observed in this study were considered to be an improvement of neuromuscular function by the central nervous system. It was also considered that 2-week exercise intervention has a lower value after 2 weeks due to an improvement of neuromuscular function by the central nervous system, and an immediate effect could not be obtained with the same exercise as at the time of intervention.
文摘The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on the Karlsson score. All participants underwent performance tests (Yo-Yo Intermittent Recovery test level 1, 20 m and 40 m Sprint, Bounding test, Shuttle run, Figure-of-8 hop test, and Side hopping). A positive relationship was observed between functional ankle instability and performance deficits on the Figure-of-8 hop test. However, functional ankle instability is thought to have an influence on football performance. In the performance tests, the results suggest the necessity of a new evaluation method with more difficult tests incorporating football movements, subjective “pain” and “instability” indices, and mechanical instability.
