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Jackson, Allen W.; Morrow, James R., Jr.; Bowles, Heather R.; FitzGerald, Shannon J.; Blair, Steven N. – Research Quarterly for Exercise and Sport, 2007
Valid measurement of physical activity is important for studying the risks for morbidity and mortality. The purpose of this study was to examine evidence of construct validity of two similar single-response items assessing physical activity via self-report. Both items are based on the stages of change model. The sample was 687 participants (men =…
Descriptors: Physical Activities, Physical Activity Level, Construct Validity, Guidelines

Blair, Steven N. – Research Quarterly for Exercise and Sport, 1993
Examines recent evidence on the relations between physical activity, physical fitness, and health, noting the possible causal nature of the associations. The article evaluates the public health burden of sedentary lifestyles in the United States and provides suggestions for increasing participation in physical activity. (SM)
Descriptors: Cardiovascular System, Chronic Illness, Epidemiology, Health Behavior