Effects of exercise accumulation on plasma lipid and lipoprotein concentrations

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Jason Daniel Wagganer (Creator)
Institution
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/
Advisor
Paul Davis

Abstract: The purpose of this study was to compare the effects of a single session of exercise versus accumulated sessions of exercise on plasma lipid and lipoprotein concentrations. Twelve young (22.5±2.5 years, mean±SEM), overweight (body mass index=29.7±3.9 kg.m-2), sedentary participants performed, in random order, a single exercise session (treadmill exercise at 60% maximal oxygen consumption for 90 minutes), accumulated exercise sessions (the same protocol as above for three consecutive days), and a control session (no exercise for six consecutive days). Blood samples taken immediately before each exercise/control session, and at 24, 48 and 72 after exercise were analyzed for high-density lipoprotein cholesterol (HDL-C) and triglyceride (TG) concentrations. Data were analyzed using a repeated measures ANOVA, based upon a priori analyses (i.e., pre versus post-exercise time points) both within and across protocols. Significant interactions and main effects were analyzed using post-hoc paired samples T-tests. Statistical significance was set at the 0.05 level. The three exercise session protocol produced significant elevations in HDL-C concentrations 24 and 48 hours post-exercise, compared to the control. Additionally, there was a significant time by trial interaction for HDL-C, with concentrations elevated at 48 hours post-exercise for the three exercise session protocol compared to the single session. A significant percentage change reduction in TG concentration was observed after the three exercise session protocol compared to the ontrol. These results suggest that, in young, overweight, sedentary individuals, accumulating three consecutive 90-minute sessions of exercise is more effective in improving plasma HDL-C and TG concentrations when compared to a single session of exercise. In summary, these results support the additive benefits of exercise and justifies future exercise training studies aimed at determining the exact manner in which to accumulate exercise sessions (e.g., every day, every other day, etc.) in an effort to most effectively improve an individual’s lipid and lipoprotein profile.

Additional Information

Publication
Dissertation
Language: English
Date: 2009
Keywords
Accumulated, Exercise, Lipid, Lipoprotein, Single session
Subjects
Exercise $x Physiological aspects.
Blood lipids.
Blood lipoproteins.
Overweight persons.