Comparison of the effect of different intensity exercise on a bicycle ergometer on postprandial lipidemia in type II diabetic patients

BACKGROUND: Postprandial lipid clearance failure and lipoprotein disorders, which are independent risk factors for cardiovascular diseases are well-recognized in type II diabetes. Reduction of fats through exercise has been proved, though the mechanism is not well-defined, and the effects of different intensity exercise on postprandial lipidemia in diabetes type II is unknown. This study aims to find these effects using a cycle ergometer. METHODS: On three different days, ۱۵ type II diabetics (۱۰ women and ۵ men, with a mean age ۴۲.۰۷ ± ۶.۰۵ years, weight ۹۴.۶۴ ± ۴.۳۷ kg, height ۱۵۹.۷۸ ± ۹.۰۹ cm, and body mass index ۲۹.۸۳ ± ۳.۹۳ kg/m۲), consumed a full fat breakfast (۷۵۰-۸۰۰ kcal, ۸۵% fat), and ۱۵۰ min later, blood samples were taken from them to measure their lipid profile. The ۱st day was the control day, without any exercises. Seven days later, ۹۰ min after enriched breakfast, they did ۳۰ min of exercise on the cycle ergometer with intensity of ۵۵-۷۰% of maximum heart rate (HRmax), and ۱۴ days later, ۹۰ min after enriched breakfast, they did ۳۰ min of exercise with intensity of ۷۰-۸۵% of HRmax. RESULTS: According to Friedman non-parametric test, high-density lipoprotein (HDL) cholesterol serum level significantly increased after ۳۰ min of moderate intensity exercise (P > ۰.۰۵, from ۳۹.۴ ± ۵.۲ to ۴۸.۶ ± ۹.۳), while this increase was insignificant after a higher intensity exercise. Neither intensity levels had any significant effects on triglyceride or on low-density lipoprotein cholesterol. CONCLUSION: Results showed that moderate intensity exercise was more effective in increasing HDL cholesterol level in type II diabetics.   Keywords: Postprandial Lipidemia, Resistance Exercise, Bicycle Ergometer, Type II Diabetes