a Graduate School of Health Sciences , University of the Ryukyus , Okinawa , Japan.
b Faculty of Medicine , University of the Ryukyus , Nishihara , Japan.
J Sports Sci. 2019 Jun;37(11):1242-1249. doi: 10.1080/02640414.2018.1554552. Epub 2018 Dec 14.
The purpose of this study was to examine the potential role of aerobic fitness (AF) as a mediator of the association between physical activity (PA) and academic achievement (AA) among Japanese junior high school students. A cross-sectional data was collected from 608 7th grade students enrolled at five public junior high schools in two suburban municipalities in Okinawa, Japan. Self-reported PA was assessed using the Patient-Centred Assessment and Counselling for Exercise plus Nutrition questionnaire. The 20-meter shuttle run test was performed to determine AF. AA was evaluated using the overall grade point average. Family structure, parental education level, and achievement motives were the self-reported covariates. The results of the bootstrapped mediation analysis indicated that PA had a direct effect on AF, which in turn influenced the AA among boys. After adjusting for AF, the association between PA and AA disappeared while the association of AF with AA still remained. However, neither PA nor AF was associated with the AA of girls. Therefore, the hypothesis that AF might mediate the relationship between PA and AA was supported for boys. Promoting AF, as a result of engaging to PA could positively influence AA particularly in boys.
本研究旨在探讨日本初中生的有氧适能（AF）在体力活动（PA）与学业成绩（AA）之间的关联中是否起到中介作用。本研究采用横断面数据，从日本冲绳县两个郊区的五所公立初中招募了 608 名 7 年级学生。PA 采用“患者为中心的评估和锻炼加营养咨询问卷”进行自我报告评估。AF 通过 20 米折返跑测试确定。AA 采用总体平均绩点进行评估。家庭结构、父母教育水平和成就动机是自我报告的协变量。Bootstrapped 中介分析的结果表明，PA 对 AF 有直接影响，进而影响男孩的 AA。在调整了 AF 后，PA 与 AA 之间的关联消失，而 AF 与 AA 之间的关联仍然存在。然而，PA 和 AF 都与女孩的 AA 无关。因此，AF 可能在 PA 与 AA 之间起中介作用的假设在男孩中得到支持。促进 PA 所带来的 AF 可能会积极影响 AA，特别是在男孩中。
