Biological maturation, fat mass and cardiorespiratory fitness in prepubescent girls: A mediation analysis

IF 1.6 4区医学 Q1 ANTHROPOLOGY

American Journal of Human Biology Pub Date : 2024-06-20 DOI:10.1002/ajhb.24120

Leonardo Gomes de Oliveira Luz, Danilo Rodrigues Pereira da Silva, Rafael dos Santos Henrique, Bruno Barbosa Giudicelli, Manuel João Coelho e Silva

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引用次数: 0

Abstract

Background

The association between indicators of maturation and measures of physical fitness are not well correlated and vary according to chronological age, sex, body size, and motor characteristics. It is known that chronological age, maturation, and fat mass are significant predictors of cardiorespiratory fitness in girls, however, the contributions of fat mass to the relationship between maturation and endurance performance are still unclear.

Objective

The current study aimed to examine whether the association between somatic maturation and running performance in the 20-m shuttle-run in girls is mediated by estimated fat mass.

Methods

The sample comprised 67 girls, aged 8.00–8.99 years. Stature, body mass, and skinfolds were measured. Estimates of body composition and predicted mature stature (PMS) were then calculated. Current stature was expressed as a percentage of PMS and somatic maturation was given by z-scores of the percentage of PMS. Mediation analysis was performed using the bias-corrected bootstrap approach with 5000 resamples in order to obtain estimates of total, direct, and indirect effects of z-scores of the percentage of PMS on 20-m shuttle-run performance mediated by fat mass.

Results

The results show that fat mass mediated the negative effect of biological maturation on 20-m shuttle-run performance in the observed sample of prepubescent girls (Indirect effect: β = −0.177, 95%CI: −0.291 to −0.059).

Conclusion

Although the participants were prepubescent girls, poorer aerobic running performance appeared to be partly due to increased levels of fat mass.

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青春期前少女的生理成熟、脂肪量和心肺功能：中介分析

背景：成熟度指标与体能测量之间的关系并不十分相关，而且因实际年龄、性别、体型和运动特征的不同而各异。众所周知，实际年龄、成熟度和脂肪量是预测女孩心肺功能的重要指标，然而，脂肪量对成熟度与耐力表现之间关系的贡献仍不清楚：本研究旨在探讨躯体成熟度与女孩 20 米往返跑成绩之间的关系是否受估计脂肪量的影响：样本包括 67 名女孩，年龄为 8.00-8.99 岁。对身材、体重和皮褶进行了测量。然后计算出身体成分和预测成熟身材（PMS）的估计值。目前的身材以 PMS 的百分比表示，躯体成熟度则以 PMS 百分比的 Z 值表示。使用偏差校正引导法进行了中介分析，并进行了 5000 次重新采样，以获得由脂肪量中介的 PMS 百分比 z 值对 20 米往返跑成绩的总效应、直接效应和间接效应的估计值：结果表明，在所观察的青春期前女孩样本中，脂肪量介导了生理成熟对 20 米往返跑成绩的负效应（间接效应：β = -0.177，95%CI：-0.291 至 -0.059）：结论：虽然参与者是青春期前的女孩，但有氧跑步成绩较差的部分原因似乎是脂肪含量增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

American Journal of Human Biology 生物-生物学

CiteScore

4.80

自引率

13.80%

发文量

124

审稿时长

4-8 weeks

期刊介绍： The American Journal of Human Biology is the Official Journal of the Human Biology Association. The American Journal of Human Biology is a bimonthly, peer-reviewed, internationally circulated journal that publishes reports of original research, theoretical articles and timely reviews, and brief communications in the interdisciplinary field of human biology. As the official journal of the Human Biology Association, the Journal also publishes abstracts of research presented at its annual scientific meeting and book reviews relevant to the field. The Journal seeks scholarly manuscripts that address all aspects of human biology, health, and disease, particularly those that stress comparative, developmental, ecological, or evolutionary perspectives. The transdisciplinary areas covered in the Journal include, but are not limited to, epidemiology, genetic variation, population biology and demography, physiology, anatomy, nutrition, growth and aging, physical performance, physical activity and fitness, ecology, and evolution, along with their interactions. The Journal publishes basic, applied, and methodologically oriented research from all areas, including measurement, analytical techniques and strategies, and computer applications in human biology. Like many other biologically oriented disciplines, the field of human biology has undergone considerable growth and diversification in recent years, and the expansion of the aims and scope of the Journal is a reflection of this growth and membership diversification. The Journal is committed to prompt review, and priority publication is given to manuscripts with novel or timely findings, and to manuscripts of unusual interest.