Steven P Hooker1, Brent Hutto2, Wenfei Zhu3, Steven N Blair4, Natalie Colabianchi5, John E Vena6, David Rhodes7, Virginia J Howard8. 1. Exercise Science and Health Promotion Program, School of Nutrition and Health Promotion, Arizona State University, United States. Electronic address: steven.hooker@asu.edu. 2. Prevention Research Center, Arnold School of Public Health, University of South Carolina, United States. Electronic address: brent@brenthutto.com. 3. Exercise Science and Health Promotion Program, School of Nutrition and Health Promotion, Arizona State University, United States. Electronic address: wenfei.zhu@asu.edu. 4. Departments of Exercise Science and Epidemiology and Biostatistics, Arnold School of Public Health, United States. Electronic address: sblair@mailbox.sc.edu. 5. Institute for Social Research, University of Michigan, United States. Electronic address: colabianchi@umich.edu. 6. Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, United States. Electronic address: vena@musc.edu. 7. Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, United States. Electronic address: drhodes@ms.soph.uab.edu. 8. Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, United States. Electronic address: vjhoward@uab.edu.
Abstract
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™ accelerometer ≥10h/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 0-16min/day and associated with 3-12% accumulating ≥150min/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±0.08bouts/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.
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™ accelerometer ≥10h/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 0-16min/day and associated with 3-12% accumulating ≥150min/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±0.08bouts/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.
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