A. Plasma Lipoprotein Cholesterol
Regular vigorous exercise increases high-density lipo-protein (good) cholesterol from 1 to 10%. It is debatable whether this slight rise in HDL cholesterol decreases risk over a long period of time. Moderate exercise has a variable effect. The total blood cholesterol and low-density lipoprotein (bad) cholesterol are not significantly reduced by exercise. Elevated triglycerides are reduced by exercise, but elevated triglycerides are not considered to be a defini¬tive risk factor for coronary heart disease. The evidence linking elevated blood triglycerides with atheromatous disease of the coronary arteries remains weak.
1. Clinical Study
Kraus et al. performed a prospective randomized study of the effects of the amount and intensity of exercise on lipoproteins. Methods: A total of 111 sedentary, overweight men and women with mild-to-moderate dyslipidemia were randomly assigned to participate for 6 months in a control group for approximately eight months in one of three exercise groups: high amount high-intensity exercise equivalent to jogging 20 miles per week; low amount high-intensity exercise equivalent to jogging 12 miles per week; or low amount moderate-intensity exercise equiva¬lent to walking 12 miles per week. Individuals were encouraged to maintain their baseline body weight. In this study, 84 subjects complied with these guidelines and lipoprotein analysis was assessed.

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