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Article in English | WPRIM | ID: wpr-379110


The purpose of this study was to investigate the fluctuation of the recovery period of autonomic nervous activity (ANA) after isokinetic exercise. Sixteen male subjects participated in this study after they turned in their consent forms.The subjects performed isokinetic knee extension-flexion exercise using BIODEX. We obtained the electro-cardiogram during the entire experiment. We calculated their heart rate (HR) and power spectral of R-R interval (LF is low frequency component, and HF is high frequency component. Both indexes were converted to a logarithm transformation as to lnHF and lnLF.) from pre-exercise period (PRE) and post-exercise period (POST).Some researchers reported that ΔlnHF of POST was lower and ΔLF/HF of POST was higher than those of PRE immediately after aerobic exercise; however, this study's results were in complete contrast.In conclusion, we found that the recovery periods after aerobic and isokinetic exercises of ANA are entirely different.

Article in Japanese | WPRIM | ID: wpr-372124


The purpose of this study was to investigate characteristics of past injuries of female university soccer players in comparison with injuries in male university soccer players.<BR>We investigated past injuries of female players (n=32) and male players (n=24) . A past injury was defined as any injury sustained during soccer that required admission to a team doctor, medical attention or absence from practices or games for more than seven days.<BR>The most frequent injury was Joint Injuries in both female and male players. High occurrence of overuse injuries of lower leg was most apparent in the female players. The 32 female players had experienced 144 injuries, or 4.5 injuries per player, and the 24 male players had suffered 85 injuries, or 3.5 injuries per player. The numbers of injuries per player of female players were 1.3 times higher than the male players. Also, the incidence of injury was 0.64 (injury/player/year) in female players, and 0.27 (injury/player/year) in male players. The incidence of injury of female players was significantly larger than that of male players.<BR>We conclude that the prevention and care of overuse injuries in lower leg is very important for female succor players.