Accelerometer measured sedentary behavior and physical activity in white and black adults: The REGARDS study

作者：Hooker Steven P^*; Hutto Brent; Zhu Wenfei; Blair Steven N; Colabianchi Natalie; Vena John E; Rhodes David; Howard Virginia J

来源：Journal of Science and Medicine in Sport, 2016, 19(4): 336-341.

DOI：10.1016/j.jsams.2015.04.006

• African American
• Aging
• Cohort
• Exercise
• Movement sensor
• Patterns

Objectives: Health disparities between subgroups may be partially due to differences in lifestyle behaviors such as sedentariness and physical activity. To obtain a more accurate description of these two lifestyle behaviors, accelerometry was employed among a large sample of white and black adults (ages 49-99 years) living in the United States.
Design: Cross-sectional.
Methods: 7967 participants from the REasons for Geographic and Racial Differences in Stroke cohort wore an Actical (TM) accelerometer >= 10 h/day for >= 4 days. Time (mean minutes/day and proportion of total wear time) spent in sedentary behavior, light intensity physical activity, and moderate-vigorous intensity physical activity was compared by sex, age, body mass index, race, and geographic location.
Results: Proportion of total wear time spent in sedentary behavior was 75-90%, light intensity physical activity was 10-23%, and moderate-vigorous intensity physical activity was 0-1.7% across subgroups. Mean moderate-vigorous intensity physical activity was 0-16 min/day and associated with 3-12% accumulating >= 150 min/wk using a 10-min bout criterion. Persons >= 85 years, those classified obese, persons living in the southeastern United States, and black women were the most inactive. The proportion achieving at least one 10-min bout of moderate-vigorous intensity physical activity per week was only 36%. The number of 10-min bouts/week was 1.5 +/- 0.08 bouts/week. The distribution of weekly moderate-vigorous intensity physical activity was similar across nearly all subgroups with a distinct reverse J-shaped configuration.
Conclusions: The vast majority of white and black midlife and older adults in this study engaged sparingly in moderate-vigorous intensity physical activity, accumulated tremendous amounts of sedentary behavior, and seldom engaged in continuous bouts of health-enhancing physical activity.

• 出版日期2016-4