Objective

To explore the influence of physical activity intensity on physical fitness of preschool children.

Methods

Taking 192 preschool children in Changsha City as the research objects, using accelerometers to measure physical activity intensity, using correlation analysis, multiple regression analysis and isochronous substitution paradigm to analyze the correlation between different physical activity intensities.

Results

(1) There was no significant correlation between LPA and its physical fitness indicators. (2) MPA is significantly correlated with physical fitness indicators of preschool children. (3) After controlling for gender, age, wearing time and other factors, MVPA, especially MPA, still has a significant influence on various indicators of physical fitness; (4) After MVPA replaces PA of other strengths, physical fitness changes only when MVPA replaces others. The direction consistency and significance are only when the intensity is PA.

Conclusion

VPA is closely related to the physical fitness of preschool children. Promoting the improvement of VPA may be crucial to the physical development of preschool children.

中文翻译：

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体育锻炼强度对3-6岁学龄前儿童生长发育的影响

客观的

探讨体育锻炼强度对学龄前儿童身体素质的影响。

方法

以长沙市192名学龄前儿童为研究对象，采用加速度计测量体力活动强度，采用相关分析，多元回归分析和等时代用范式分析不同体力活动强度之间的相关性。

结果

（1）LPA与身体健康指标之间无显着相关性。（2）MPA与学龄前儿童的身体素质指标显着相关。（3）在控制了性别，年龄，佩戴时间等因素之后，MVPA，尤其是MPA，仍然对各种身体素质指标产生重大影响；（4）MVPA替代了其他强度的PA后，只有当MVPA替代其他强度的PA时，身体健康才会发生变化。仅当强度为PA时，方向一致性和重要性才有效。

结论

VPA与学龄前儿童的身体健康密切相关。促进VPA的改善对于学龄前儿童的身体发育可能至关重要。