背景:日本儿童的身体素质水平低于1980年代。最近制定了24小时运动指南,以改善儿童的当前和未来健康。这项研究检查了符合24小时运动指南是否与小学生的身体素质指标有关。
方法:参与者为243名日本儿童(9.4±1.7岁)。使用加速度测量法评估了中度至剧烈的身体活动(MVPA)。报告睡眠持续时间和屏幕时间。体能是通过握力来评估的,仰卧起坐,坐着躯干弯曲,和20米穿梭运行测试。符合24小时运动指南的定义是:9-11小时/晚上的睡眠,≤2小时/天的筛选时间,和至少60分钟/天的MVPA。使用协方差分析分析了身体健康与建议之间的关联。
结果:与不符合建议的儿童相比,仅符合MVPA建议的儿童在20m穿梭跑和仰卧起坐测试中表现更好(圈数:41比36,P=0.009,重复次数:16.3比14.7,P=0.021)。与不符合建议的儿童相比,符合MVPA和睡眠建议组合的儿童在仰卧起坐测试中得分明显更高(重复次数:16.5vs15.0,P=0.038),但效果与MVPA相似仅参考。在此样本中,满足所有三个24小时运动指南与健身措施无关。符合MVPA建议与更大的有氧健身和肌肉耐力相关。
结论:为了提高儿童的身体素质,公共卫生建议应主要针对MVPA。
BACKGROUND: Physical fitness levels in Japanese children are lower than those in the 1980s. Twenty-four hour movement
guidelines were recently developed to improve both present and future health of children. This study examined whether meeting the 24 h movement
guidelines was associated with physical fitness measures in primary school children.
METHODS: Participants were 243 Japanese children (9.4 ± 1.7 years). Moderate-to-vigorous physical activity (MVPA) was evaluated using accelerometry. Sleep duration and screen time were reported. Physical fitness was assessed by grip strength, sit-ups, sitting trunk flexion, and 20 m shuttle run test. Meeting the 24 h movement
guidelines was defined as: 9-11 h / night of sleep, ≤2 h/day of screen time, and at least 60 min/day of MVPA. The associations between physical fitness and the recommendations were analyzed using analysis of covariance.
RESULTS: Children meeting the MVPA recommendation alone performed better on the 20 m shuttle run and sit-up test compared to those not meeting the recommendation (number of laps: 41 vs 36, P = 0.009 and number of repetitions: 16.3 vs 14.7, P = 0.021). Children meeting the combination of MVPA and sleep recommendation scored significantly higher on the sit-up test compared to those not meeting the recommendations (number of repetitions: 16.5 vs 15.0, P = 0.038) but the effect was similar to that of the MVPA reference only. Meeting all three 24 h movement
guidelines was not associated with measures of fitness in this sample. Meeting the MVPA recommendation was associated with greater aerobic fitness and muscle endurance.
CONCLUSIONS: In order to enhance children\'s physical fitness, public health recommendations should primarily target MVPA.