1. American College of Sports Medicine. (1978). The recommended quantity and quality of exercise for developing and maintaining fitness in healthy adults. Medicine and Science in Sports, 10, vii-x.
2. Blair, S. N., Kampert, J. B., Kohl, H. W., Barlow, C. E., Macera, C. A.Paffenbarger, R. S., etal. (1996). Influences of cardiovascular fitness and other precursors on cardiovascular diseaseand all-cause mortality in men and women. Journal of the American Medical Association, 276, 205-210.
3. Blair, S. N., Kohl, H. W, Paffenbarger, R. S., Clark, D. G., Cooper, K. H. & Gibbons, L. W. (1989). Physical fitness and all-cause mortality: A prospective study of healthy men and women. Journal of the American Medical Association, 262, 2395-2401.
4. Casperson, C. J., Powell, K. E. & Christensen, G. M. (1985). Physical activity, exercise, and physical fitness: Definitions and distinctions for health-related research. Public Health Reports, 100, 126-131.
5. Conrad, C. C. (1987). A chronology of the development of corporate fitness in the United States. Fitness in Business, 1, 156-166.