Factors associated with muscular fitness phenotypes in Australian children: A cross-sectional study
Factors associated with muscular fitness phenotypes in Australian children: A cross-sectional study
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DOI：
10.1080/02640414.2019.1679575
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发表时间：
2019-10-17
影响因子：
3.4
通讯作者：
Magnussen, Costan G.
中科院分区：
文献类型：
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作者：
Fraser, Brooklyn J.;Blizzard, Leigh;Magnussen, Costan G.
为了帮助制定旨在提高肌肉健康水平的策略，我们研究了在最近观察到的长期衰退之前与儿童肌肉健康（力量和爆发力）相关的因素。数据来自 1985 年澳大利亚 7-15 岁儿童的全国代表性样本（n=8469）。肌肉健康指标包括力量（左右握力、肩部伸展和屈曲以及腿部力量）和爆发力（站立跳远距离）。提供人体测量（肥胖、去脂体重）、心肺健康（CRF）、灵活性、速度能力、体力活动（个人和父母）、膳食质量和摄入量（水果、蔬菜、蛋白质）和社会人口学（地区社会经济地位（SES）、学校类型）数据。统计分析包括性别分层线性回归。在所有检查的因素中，肥胖、去脂体重、CRF、灵活性和速度能力的测量与满足科恩重要影响阈值的肌肉健康水平相关（r 平方？ = 0.02 至 0.28）。这些发现强调了肌肉健康及其决定因素之间的多因素关系。总的来说，这些因素在解释肌肉力量（女性：r-squared？=？0.32；男性：r-squared？=？0.41）和肌肉力量（女性：r-squared？=？0.36；男性：r-squared？=？0.42）方面发挥了重要作用。这些发现强调了可改变的环境因素，这些因素可用于增强儿童的肌肉健康。
To help inform strategies aimed at increasing muscular fitness levels, we examined factors associated with childhood muscular fitness (strength and power) that preceded the recently observed secular decline. Data were available from a nationally representative sample of Australian children aged 7?15?years in 1985 (n?=?8469). Muscular fitness measures included strength (right and left grip, shoulder extension and flexion, and leg strength) and power (standing long jump distance). Anthropometric (adiposity, fat-free mass), cardiorespiratory fitness (CRF), flexibility, speed capability, physical activity (individual and parental), dietary quality and intake (fruit, vegetable, protein) and sociodemographic (area-level socioeconomic status (SES), school type) data were available. Statistical analyses included sex-stratified linear regression. Of all examined factors, measures of adiposity, fat-free mass, CRF, flexibility and speed capability were associated with muscular fitness at levels that met Cohen?s threshold for important effects (r-squared?=?0.02 to 0.28). These findings highlight the multifactorial relationship between muscular fitness and its determinants. Collectively, these factors were powerful in explaining muscular strength (females: r-squared?=?0.32; males: r-squared?=?0.41) and muscular power (females: r-squared?=?0.36; males: r-squared?=?0.42). These findings highlight modifiable and environmental factors that could be targeted to increase childhood muscular fitness.