Relations of moderate and vigorous physical activity to fitness and fatness in adolescents
Relations of moderate and vigorous physical activity to fitness and fatness in adolescents
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DOI：
10.1093/ajcn/81.4.746
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发表时间：
2005-04-01
影响因子：
7.1
通讯作者：
Barbeau, P
中科院分区：
文献类型：
--
作者：
Gutin, B;Yin, ZO;Barbeau, P
背景资料：目前尚不清楚中等强度和剧烈强度的体力活动（PA）与青少年的心血管健康（CVF）和体脂百分比（%BF）之间的关系。目的：我们检验了这样一个假设，即剧烈的PA在更大程度上比中等强度的PA与更好的CVF和更低的%BF相关。设计：这是一项对421名黑人和白色高中生（16岁以上）的横断面研究。PA用5 d加速度计测量，并以中度或剧烈PA的min/d表示。CVF用多级跑台试验测量，并表示为心率为170 bpm时的耗氧量。用双能X线吸收法测量%BF。多元回归分析被用来确定在何种程度上的CVF和%BF的方差解释PA，控制后的年龄，性别，种族，和性别X种族interaction.Results：一个较高的指数CVF与较高的金额的中度和剧烈的PA;更多的方差解释剧烈比中度PA。较低的%BF是与较高的金额的积极PA，但不与金额的中度PA。结论：黑人和白色青少年从事相对大量的自由生活的积极运动可能是相对适合和精益。
Background: It is unclear how moderate and vigorous intensities of physical activity (PA) are associated with cardiovascular fitness (CVF) and percentage of body fat (%BF) in adolescents.Objective: We tested the hypothesis that vigorous PA, to a greater degree than moderate PA, would be associated with better CVF and lower %BF.Design: This was a cross-sectional study of 421 black and white high school students ((x) over bar age: 16 y). PA was measured with 5 d of accelerometry and expressed in min/d of moderate or vigorous PA. CVF was measured with a multistage treadmill test and was expressed as the oxygen consumption at a heart rate of 170 bpm. %BF was measured with dual-energy X-ray absorptiometry. Multiple regressions were used to determine the degree to which variance in CVF and %BF was explained by PA, after control for age, sex, race, and the sex X race interaction.Results: A higher index for CVF was associated with higher amounts of moderate and vigorous PA; more variance was explained by vigorous than by moderate PA. Lower %BF was associated with higher amounts of vigorous PA but not with the amount of moderate PA.Conclusion: Black and white adolescents who engaged in relatively large amounts of free-living vigorous exercise were likely to be relatively fit and lean.