The aim of training Comprehensive Community Sport Club (CCSC) managers, which was specifically emphasized in the policy for fostering CCSCs, was to develop their abilities without examining their duties and behaviors. Accordingly, the purpose of this study was to identify CCSC managers’ behaviors and their determinants in relation to the characteristics of community sports clubs in Japan. A questionnaire survey was completed by 328 club managers. The structure of management behaviors and relationship between them and basic attributes, sports and community life experiences, and community awareness were analyzed. Nine clusters of management behaviors emerged from the results. Furthermore, sport experience and community awareness had different effects on the nine behaviors. While sport-related experiences influenced general management behaviors, community awareness affected relationship building with the organization, which many clubs experience as challenging. These results indicate that CCSC management and club managers’ behaviors reveal the characteristics of both sport and community organizations. Furthermore, the problem-solving that many clubs encounter may be not facilitated through manager training that is separated from the regional community. Club management should not ignore awareness that is fostered in daily life.
In a previous questionnaire study with German professional athletes, we showed that the prevalence of lucid dreaming in athletes is 57% and that about 5% of athletes use their lucid dreams to practice sport skills while asleep. The present study applied a Japanese translation of the same questionnaire to a Japanese sample of college athletes to explore cultural differences. We found that about 41% of Japanese athletes stated that they experienced a lucid dream at least once in their lives, 18% experienced them once a month or more frequently, while 3.6% of athletes used lucid dreams for their sport practice. The frequency of lucid dreams in Japanese athletes was lower than in the German athletes, indicating potential cultural differences. Yet lucid dream practice does appear to have a cross-cultural applicability.
A high risk of ankle injury is associated with rugby; however, current epidemiological data on rugby-related ankle injuries are limited to specific age and competition levels. This study aimed to clarify the epidemiological characteristics of ankle sprains by longitudinally investigating their incidence, severity, and burden in men's collegiate rugby. Ankle sprains that occurred during rugby matches and training in 128 male collegiate rugby players were investigated across three seasons (2017 – 2019). The incidence of ankle sprain was 1.21 injuries/1000 player-hours (PHs). The risk of occurrence during matches (18.18 injuries/1000 PHs) was 25.6 times higher than that during training (0.71 injuries/1000 PHs). The mean severity of ankle sprain was 24.7 days. The injury burden tended to be higher in the match season than in the training season. The main injury mechanisms were thought to be related to contact play and stepping (non-contact play). In addition, a high rate of initial sprains was observed in this study. Ankle sprain prevention is important in collegiate rugby players.
To compare elderly non-fallers and fallers for differences in the Clinical Test of Sensory Interaction for Balance (CTSIB) and Limits of Stability (LOS). Six hundred forty-six older women volunteers (69.5 ± 6.1 yr) participated in the study. Static and dynamic balance were assessed. The static balance (SB) indices in CTSIB were analyzed four sway velocity conditions: a flat surface with eyes open (SV1); a flat surface with eyes closed (SV2); thick foam with eyes open (SV3); and thick foam with eyes closed (SV4), and composite scores (SVcomp) calculated based on all of conditions. The LOS components (endpoint excursion (EPE), maximum excursion (MXE), directional control (DCL), reaction time (RT), and movement mean velocity (MVL)) as a dynamic balance index were analyzed based on movements toward all eight targets, and composite scores. The fall incidence within the past 1 year was studied via questionnaire survey (faller = 172, non-faller = 474). There were significant differences in mean age and height between faller and non-faller groups. No significant differences were found in all balance indices between groups compared by age-adjusted ANCOVA. From the CTSIB and LOS measurement adopted in this study, no difference was observed between older fallers and non-fallers. However, in order to evaluate the presence or absence of falls based only on the balance ability, further measures such as examination by combining indicators are required. It is necessary to perform prospective studies to track the occurrence of falls after the balance ability assessment in the future.
This study aimed to investigate whether four weeks of jump and running drill training with a mini-trampoline affects sprint running, standing long jump, and drop jump performance. Fifteen healthy male students were assigned to either the trampoline training (T; n=8) or ground training (G; n=7) group. All participants performed jump and running drill training using either a mini-trampoline or over ground two times per week for 4 weeks. Before and after the training period, the participants performed a 50 m sprint run, a standing long jump, a drop-jump, and a ground reaction force evaluation test during a 20 m sprint. The pre- and post-training results were compared. The 50 m sprint record improved in both groups (P<0.01). The jump height of the drop-jump test decreased in the T group (P<0.05). The standing long jump distance did not change after the training period in either group. There was no significant change in impulse in either direction before and after the training period during the 20 m sprint run. Our results suggest that jump and running drill training using a mini-trampoline did not have any specific effect compared to jump and running drill training on the ground.