1. Physical activity and the incidence of coronary heart disease;Powell,1987
2. Physical activity, all-cause mortality, and longevity of college alumni;Paffenbarger;N Eng J Med,1986
3. The relation of physical activity and exercise to mental health;Taylor;Public Health Rep,1985
4. Health, United States, 1986;National Center for Health Statistics,1986
5. The status of the 1990 objectives for physical fitness and exercise;Powell;Public Health Rep,1986