Research Publication Title

Examination of Lipoprotein levels following different intensities of exercise in obese men

Presenter Information

Andrew SummersFollow

Major

Exercise Science

Faculty Mentor

Dr. Jinkyung Park

Keywords

Cardiovascular disease, Lipoproteins, HDL, LDL, Triglyceride

Abstract

PURPOSE: To examine the interaction between Lipoprotein levels following different intensities of exercise in obese men. METHODS: METHODS: In a randomized, cross-over design, fifteen obese (BMI > 30 kg/m2) sedentary (less than 2 days per week of physical activity) male volunteers, the ages between 18 and 30 participated in the study. The participants performed a single bout of cycling exercise (average energy expenditure ~300 kcal) at two different intensities in random order [low-intensity: 50% of maximal heart rate and high intensity: 80% of maximal heart rate]. Overnight fasting blood samples were collected at baseline, immediate post-exercise (IPE), 1-hr PE, and 24-hr PE for each intensity of exercise to determine blood lipids and lipoproteins (TC, TG, LDL-C, and HDL-C). A 2(intensity) X 4 (time) ANOVA with repeated measures was used to examine the mean differences in intensity and time on blood lipids and lipoproteins. The Bonferroni pairwise comparisons were conducted as post hoc to locate the significant mean differences. A p-value < .05 was set for the statistical significance. RESULTS: Neither low or high-intensity exercise significantly altered blood lipids and lipoproteins. There was no significant interaction between intensity and time on blood lipid profiles. CONCLUSION: Regardless of the intensity level, acute exercise may not alter blood lipid profiles in obese men due to the short volume and duration. Therefore, future research should determine if different intensities of chronic exercise alter blood lipid profiles in obese men. Keywords: Cardiovascular disease, Lipoproteins, HDL, LDL

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Examination of Lipoprotein levels following different intensities of exercise in obese men

PURPOSE: To examine the interaction between Lipoprotein levels following different intensities of exercise in obese men. METHODS: METHODS: In a randomized, cross-over design, fifteen obese (BMI > 30 kg/m2) sedentary (less than 2 days per week of physical activity) male volunteers, the ages between 18 and 30 participated in the study. The participants performed a single bout of cycling exercise (average energy expenditure ~300 kcal) at two different intensities in random order [low-intensity: 50% of maximal heart rate and high intensity: 80% of maximal heart rate]. Overnight fasting blood samples were collected at baseline, immediate post-exercise (IPE), 1-hr PE, and 24-hr PE for each intensity of exercise to determine blood lipids and lipoproteins (TC, TG, LDL-C, and HDL-C). A 2(intensity) X 4 (time) ANOVA with repeated measures was used to examine the mean differences in intensity and time on blood lipids and lipoproteins. The Bonferroni pairwise comparisons were conducted as post hoc to locate the significant mean differences. A p-value < .05 was set for the statistical significance. RESULTS: Neither low or high-intensity exercise significantly altered blood lipids and lipoproteins. There was no significant interaction between intensity and time on blood lipid profiles. CONCLUSION: Regardless of the intensity level, acute exercise may not alter blood lipid profiles in obese men due to the short volume and duration. Therefore, future research should determine if different intensities of chronic exercise alter blood lipid profiles in obese men. Keywords: Cardiovascular disease, Lipoproteins, HDL, LDL

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