Sasayama Kensaku, Adachi Minoru
Faculty of Education, Okayama University of Science, 1-1, Ridai-cho, Kita-ku, Okayama, 700-0005, Japan.
Graduate School of Education, Okayama University, 3-1-1, Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan.
BMC Res Notes. 2019 May 7;12(1):252. doi: 10.1186/s13104-019-4288-y.
The purpose of this study was to examine the tracking of objective physical activity and physical fitness from childhood to adolescence in Japanese children. The longitudinal study comprised 368 participants (aged 9-10 years) in 2008, and the study involved 134 participants (aged 13-14 years, a dropout rate of 63.6%) in 2011. After excluding participants with missing data, a total of 111 participants (46 boys and 65 girls) were available for study. Step counts and moderate-to-vigorous physical activity (MVPA) were measured using a uniaxial accelerometer. Physical fitness was assessed using the following tests: hand grip, sit-ups, sit and reach, side-to-side steps, 20-m shuttle run, 50-m dash, standing broad jump and ball throwing.
In boys, there was a significant correlation between objective physical activity and all physical fitness tests at baseline and follow-up. In girls, although there was no significant correlation between objective physical activity at baseline and follow-up, all physical fitness tests at baseline and follow-up were significantly correlated. In conclusion, moderate tracking was shown in objective physical activity of boys from childhood to adolescence. In addition, moderate to high tracking was shown in physical fitness of both sexes from childhood to adolescence.
本研究旨在调查日本儿童从童年到青春期客观身体活动和身体素质的追踪情况。这项纵向研究在2008年纳入了368名参与者（9至10岁），2011年涉及134名参与者（13至14岁，失访率为63.6%）。在排除有缺失数据的参与者后，共有111名参与者（46名男孩和65名女孩）可供研究。使用单轴加速度计测量步数和中等到剧烈身体活动（MVPA）。通过以下测试评估身体素质：握力、仰卧起坐、坐位体前屈、侧步、20米穿梭跑、50米短跑、立定跳远和投球。
在男孩中，基线和随访时客观身体活动与所有身体素质测试之间存在显著相关性。在女孩中，虽然基线和随访时的客观身体活动之间没有显著相关性，但基线和随访时的所有身体素质测试之间均存在显著相关性。总之，男孩从童年到青春期的客观身体活动呈现中度追踪。此外，两性从童年到青春期的身体素质呈现中度到高度追踪。
