The relationship between pedometer-determined ambulatory activity and body composition variables
The relationship between pedometer-determined ambulatory activity and body composition variables
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DOI：
10.1038/sj.ijo.0801783
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发表时间：
2001-11-01
影响因子：
4.9
通讯作者：
Jones, DA
中科院分区：
文献类型：
--
作者：
Tudor-Locke, C;Ainsworth, BE;Jones, DA
目的：检查计步器确定的步行活动（步数/天）与身体成分变量体重指数 (BMI) 和身体脂肪百分比之间的关系。设计：对长达 21 连续天的横断面客观活动监测研究进行二次分析。对象：总共 109 名表面健康的成年人（8 名非裔美国男性、23 名非裔美国女性、33 名白人男性、45 名白人）女性），年龄 44.9 +/- 15.8 岁，BMI = 26.9 +/- 5.1 kg /m(2)。测量：计步器评估的步行活动（步数/天）、身高和体重以及生物电阻抗的体脂百分比。结果：分析为连续变量和分类变量（使用第 25 个和第 75 个百分位数确定分布情况）步/天），步行活动始终与身体成分变量相关。每日步数与 BMI 和体脂百分比呈负相关（分别为 r = -0.30 和 r = -0.27，均 P < 0.01）。当使用公认的正常体重、超重和肥胖类别的 BMI 截止点进行检查时，这种关系的一致性也很明显。 结论：在这个小样本中，每天步数大于约 9000 步的个体更常被归类为身高体重正常。每天步数低于约 5000 步的人更常被归类为肥胖。这些发现需要进一步的确证调查，但为识别可能受益于适当的身体活动干预的高危个体提供了初步的分界点。
OBJECTIVE: To examine the relationship between pedometer-determined ambulatory activity (steps/day) and body composition variables body mass index (BMI) and percentage body fat).DESIGN: Secondary analysis of a cross-sectional objective activity monitoring study for up to 21 consecutive days.SUBJECTS: A total of 109 apparently healthy adults (eight African American males, 23 African-American females, 33 Caucasian males, 45 Caucasian females), age 44.9 +/- 15.8 y, BMI = 26.9 +/- 5.1 kg /m(2).MEASUREMENTS: Pedometer-assessed ambulatory activity (steps/day), height and weight, and percentage body fat by bioelectrical impedance.RESULTS: Analyzed as both a continuous and a categorical variable (determined using 25th and 75th percentiles for distribution for steps/day), ambulatory activity was consistently related to body composition variables. Steps/day was inversely correlated with BMI and percentage body fat (r = -0.30, and r = -0.27, respectively, both P < 0.01). The consistency of the relationship was also evident when examined using accepted BMI cut-off points for normal-weight, overweight, and obese categories.CONCLUSIONS: Individuals in this small sample with values greater than approximately 9000 steps/day are more frequently classified as normal weight for height. Individuals with values less than approximately 5000 steps/day are more frequently classified as obese. These findings require further corroborative investigation but provide preliminary cutoff points for identifying individuals at risk who may benefit from appropriate physical activity intervention.