American Journal of Epidemiology Vol. 118, No. 3: 352-359
Copyright © 1983 by The Johns Hopkins University School of Hygiene and Public Health
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CHANGES IN CORONARY HEART DISEASE RISK FACTORS ASSOCIATED WITH INCREASED TREADMILL TIME IN 753 MEN
1Institute for Aerobics Research, 12200 Preston Road Dallas, TX 75230
2Cooper Clinic Dallas, TX 75230
3School of Public Health, Department of Health Education, University of South Carolina Columbia, SC 29208
Reprint requests to Dr. Blair
Blair, S. N. (Institute for Aerobics Research, Dallas, TX 75230), K. H. Cooper, L. W. Gibbons, L. R. Gettman, S. Lewis and N. Goodyear. Changes in coronary heart disease risk factors associated with increased treadmill time in 753 men. Am J Epidemiol 1983; 118: 3529.
Associations between changes in treadmill time and changes in coronary heart disease risk factors were studied in 753 middle-aged men seen between 19781981 at the Cooper Clinic in Dallas, Texas. Men were free of known disease at baseline. Significant increases (p < 0.01) in exercise habits and treadmill time were seen over the course of the study; average follow-up was 1.6 years. In bivariate analyses, increases in treadmill time and weight loss were associated with improvements (p < 0.01) in risk factors. Multiple regression models were calculated for several risk factors with age, length of follow-up, change in weight, and change in treadmill time as independent variables. After controlling for confounding, increase in treadmill time was independently associated with decreases in the total cholesterol/high density lipoprotein-choles-terol ratio (p < 0.01) and serum uric acid (p < 0.05). High density lipoprotein-cholesterol rose with increase in treadmill time (p < 0.05).
body weight; exertion; lipoproteins; cholesterol; physical fitness
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