Objectively measured physical activity of USA adults by sex, age, and racial/ethnic groups: a cross-sectional study
Objectively measured physical activity of USA adults by sex, age, and racial/ethnic groups: a cross-sectional study
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DOI：
10.1186/1479-5868-6-31
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发表时间：
2009-06-03
影响因子：
8.7
通讯作者：
Kriska, Andrea M.
中科院分区：
文献类型：
--
作者：
Hawkins, Marquis S.;Storti, Kristi L.;Kriska, Andrea M.
背景资料：加速度计被纳入2003 - 2004年国家健康和营养检查调查（NHANES）研究周期，以客观评估身体活动。这是第一次在美国全国代表性样本中获得客观的身体活动数据。S.居民使用加速度计可以让研究人员测量总的身体活动，包括光强度和非结构化活动，这可能是一个更好的预测健康结果比结构化活动单独。本研究的目的是在美国全国样本中检查按性别、年龄和种族/民族客观确定的身体活动水平。S.方法：数据来自2003 - 2004年的NHANES，一项对美国一个复杂的多阶段概率样本的横断面研究。S.人口在检查后用Actigraph AM-7164加速度计评估身体活动7天。2，688 U. S.具有有效加速计数据的成年人（即，至少四天，至少10小时的佩戴时间）被包括在分析中。按年龄和人种/种族组的性别列出了平均每日总体力活动计数，以及以分钟为单位的累积计数，以及中等强度体力活动。广义线性模型使用的日志链接功能进行比较身体活动的性别和种族/民族群体调整age.Results：身体活动随着年龄的增长，男性和女性在所有种族/民族群体与男性比女性更活跃，与西班牙裔女性除外。西班牙裔女性在中年（40 - 59岁）时比年轻或老年人更活跃，并且在中年或老年组（即40 - 59岁或60岁及以上）中的男性活动量并没有显着减少。西班牙裔男子积累更多的总和轻强度的体力活动计数比他们的白色和黑色的同行为所有年龄groups.Conclusion：体力活动水平客观测量的加速度计表明，西班牙裔男子，在一般情况下，更活跃比他们的白色和黑色的同行。这似乎与文献中先前报告的自我报告的身体活动相反，并且确定了在光强度和/或非结构化身体活动的贡献不能假设在感兴趣的人群中均匀的情况下使用客观测量的必要性。
Background: Accelerometers were incorporated in the 2003-2004 National Health and Nutritional Examination Survey (NHANES) study cycle for objective assessment of physical activity. This is the first time that objective physical activity data are available on a nationally representative sample of U. S. residents. The use of accelerometers allows researchers to measure total physical activity, including light intensity and unstructured activities, which may be a better predictor of health outcomes than structured activity alone. The aim of this study was to examine objectively determined physical activity levels by sex, age and racial/ethnic groups in a national sample of U. S. adults.Methods: Data were obtained from the 2003-2004 NHANES, a cross-sectional study of a complex, multistage probability sample of the U. S. population. Physical activity was assessed with the Actigraph AM-7164 accelerometer for seven days following an examination. 2,688 U. S. adults with valid accelerometer data (i.e. at least four days with at least 10 hours of wear-time) were included in the analysis. Mean daily total physical activity counts, as well as counts accumulated in minutes of light, and moderate-vigorous intensity physical activity are presented by sex across age and racial/ethnic groups. Generalized linear modeling using the log link function was performed to compare physical activity in sex and racial/ethnic groups adjusting for age.Results: Physical activity decreases with age for both men and women across all racial/ethnic groups with men being more active than women, with the exception of Hispanic women. Hispanic women are more active at middle age (40-59 years) compared to younger or older age and not significantly less active than men in middle or older age groups (i.e. age 40-59 or age 60 and older). Hispanic men accumulate more total and light intensity physical activity counts than their white and black counterparts for all age groups.Conclusion: Physical activity levels measured objectively by accelerometer demonstrated that Hispanic men are, in general, more active than their white and black counterparts. This appears to be in contrast to self-reported physical activity previously reported in the literature and identifies the need to use objective measures in situations where the contribution of light intensity and/or unstructured physical activity cannot be assumed homogenous across the populations of interest.