身体活动与代谢风险的种族差异：达拉斯心脏研究

Ethnic differences in physical activity and metabolic risk: the Dallas Heart Study.

作者信息

Lakoski Susan G, Kozlitina Julia

机构信息

1Department of Internal Medicine, University of Vermont, Colchester, VT; and 2Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX.

出版信息

Med Sci Sports Exerc. 2014 Jun;46(6):1124-32. doi: 10.1249/MSS.0000000000000211.

DOI:10.1249/MSS.0000000000000211

PMID:24576860

Abstract

PURPOSE

This study aimed to examine ethnic differences in objectively measured physical activity (PA) and the relationship between PA and metabolic risk factors.

METHODS

The analysis included 2566 participants of the Dallas Heart Study (53% non-Hispanic black, 32% non-Hispanic white, and 15% Hispanic) who wore an accelerometer for an average of 7 d. PA was assessed as mean activity counts and time spent in moderate and vigorous activity. Outcomes included body mass index (BMI), waist circumference, systolic and diastolic blood pressure, heart rate, fasting glucose, homeostatic model assessment of insulin resistance, and plasma lipid and lipoprotein levels.

RESULTS

A higher proportion of Hispanics than either whites or blacks obtained the recommended ≥ 150 min·wk of moderate PA (24%, 14%, and 10%, respectively, P < 0.0001). White males were more likely to engage in vigorous activity than other sex-ethnic groups (P < 0.05). Time in moderate-to-vigorous activity was inversely related to BMI, waist circumference, homeostatic model assessment of insulin resistance, heart rate, and positively associated with high-density lipoprotein cholesterol levels (P < 0.0001) in the combined cohort, and the relationship was similar in all ethnic groups (P interaction > 0.05). A significant inverse association between PA and triglycerides was observed in whites (P = 7.2 × 10). Vigorous activity was associated with greater differences in risk factors than moderate activity (for example, β = -0.30 vs β = -0.02 for BMI). Bouts lasting ≥10 min were associated with metabolic risk factors independent of <10-min bouts in the overall sample, with similar trends observed within subgroups.

CONCLUSIONS

Hispanics had higher levels of moderate activity than whites or blacks, whereas white men had higher levels of vigorous PA than other sex-ethnic groups. The relationship between PA and several metabolic risk factors was similar across ethnicities. Vigorous PA was associated with greater benefits than moderate PA.

摘要

目的

本研究旨在探讨客观测量的身体活动（PA）中的种族差异以及PA与代谢危险因素之间的关系。

方法

分析纳入了达拉斯心脏研究的2566名参与者（53%为非西班牙裔黑人，32%为非西班牙裔白人，15%为西班牙裔），他们平均佩戴加速度计7天。PA通过平均活动计数以及中度和剧烈活动所花费的时间进行评估。研究结果包括体重指数（BMI）、腰围、收缩压和舒张压、心率、空腹血糖、胰岛素抵抗的稳态模型评估以及血浆脂质和脂蛋白水平。

结果

西班牙裔获得推荐的每周≥150分钟中度PA的比例高于白人和黑人（分别为24%、14%和10%，P<0.0001）。白人男性比其他性别 - 种族群体更有可能进行剧烈活动（P<0.05）。在合并队列中，中度至剧烈活动时间与BMI、腰围、胰岛素抵抗的稳态模型评估、心率呈负相关，与高密度脂蛋白胆固醇水平呈正相关（P<0.0001），并且在所有种族群体中这种关系相似（P交互作用>0.05）。在白人中观察到PA与甘油三酯之间存在显著的负相关（P = 7.2×10）。与中度活动相比，剧烈活动与危险因素的差异更大（例如，BMI的β值为 -0.30对 -0.02）。在总体样本中，持续≥10分钟的运动与代谢危险因素相关，独立于<10分钟的运动，在亚组中也观察到类似趋势。