Sun Pengwei, Zhang Feng, Bi Cunjian, Yin Xiaojian, Guo Yaru, Hong Jun, Hu Yanyan, Liu He
College of Physical Education and Health, East China Normal University, Shanghai, 200241, China.
School of Physical Education, Xinjiang Normal University, Urumqi, 830054, Xinjiang, China.
Sci Rep. 2025 May 28;15(1):18723. doi: 10.1038/s41598-025-03131-3.
The low level of physical fitness among Chinese adolescents has a negative impact on schooling and health. The weight-adjusted waist index (WWI) has attracted much attention as a novel indicator for assessing body composition. However, little research has been conducted on the association between WWI and the physical fitness index (PFI) among adolescents in the Xinjiang region of western China. A randomized whole-cluster sampling method was used to assess 4496 adolescents aged 12-17 years in Xinjiang, China. The assessment indexes included height, weight, waist circumference, grip strength, sit-up, standing long jump, sit and reach, 50 m dash, 20-mSRT, and the WWI and PFI were calculated. One-way analysis of variance (ANOVA), Kruskal Wallis rank sum test, Pearson correlation analysis, and curvilinear regression analysis were used to analyze the correlations that existed between WWI and PFI. The differences in PFI between different WWI subgroups of Chinese adolescents in Xinjiang were all statistically significant when compared with each other (H-values of 57.058, 137.515, and 19.443, P < 0.01). The analyzed results did not change according to age. Similarly, the same trend was observed for boys and girls. Overall, WWI showed an inverted "U" curve relationship with PFI, and the effect of increased WWI on PFI was more pronounced in boys than in girls. When the WWI is 8.8, the PFI is at its highest level, i.e. 0.131. The relationship between WWI and PFI in Chinese adolescents in Xinjiang showed an inverted "U" curve, with lower or higher WWI negatively affecting PFI, and the effect on boys was more obvious than that on girls. In the future, the WWI level of Chinese adolescents in Xinjiang should be effectively controlled to keep it within a reasonable range, promote the development of physical fitness, and safeguard physical and mental health.
中国青少年身体素质水平较低，这对他们的学业和健康产生了负面影响。体重调整腰围指数（WWI）作为一种评估身体成分的新指标，已备受关注。然而，关于中国西部新疆地区青少年的WWI与身体素质指数（PFI）之间的关联，相关研究甚少。本研究采用随机整群抽样方法，对中国新疆地区4496名12至17岁的青少年进行了评估。评估指标包括身高、体重、腰围、握力、仰卧起坐、立定跳远、坐位体前屈、50米短跑、20米折返跑，并计算了WWI和PFI。采用单因素方差分析（ANOVA）、Kruskal Wallis秩和检验、Pearson相关分析和曲线回归分析，以分析WWI与PFI之间的相关性。新疆中国青少年不同WWI亚组之间的PFI差异在相互比较时均具有统计学意义（H值分别为57.058、137.515和19.443，P＜0.01）。分析结果不受年龄影响。同样，男孩和女孩也呈现出相同的趋势。总体而言，WWI与PFI呈倒“U”形曲线关系，且WWI增加对PFI的影响在男孩中比在女孩中更为明显。当WWI为8.8时，PFI达到最高水平，即0.131。新疆中国青少年的WWI与PFI之间的关系呈倒“U”形曲线，WWI过低或过高均对PFI产生负面影响，且对男孩的影响比对女孩更为明显。未来，应有效控制新疆中国青少年的WWI水平，使其保持在合理范围内，促进身体素质发展，保障身心健康。
