title: Blood lipid responses after continuous and accumulated aerobic exercise.
abstract: The purpose of this study was to compare blood lipid responses to continuous versus accumulated exercise. Nine participants completed the following conditions on separate occasions by treadmill walking/jogging at 70% of VO2max: 1) one 500-kcal session and 2) three 167 kcal sessions. Total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and triglycerides (TG) concentrations were measured from serum samples obtained 24 h prior to and 24 and 48 h after exercise. All blood lipid responses were analyzed in 2 (condition) x 3 (time) repeated measures ANOVAs. HDL-C increased by 7 mg/dL over baseline at 48 h post-exercise with three accumulated sessions versus 2 mg/dL with continuous exercise (P < 0.05). Triglyceride concentrations were unchanged in both conditions. These findings suggest that three smaller bouts accumulated on the same day may have a modestly greater effect for achieving transient increases in HDL-C compared to a continuous bout of similar caloric expenditure.
authors.affiliation: Dept of Health & Human Performance, Auburn University, AL 36849, USA.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Mestek
authors.forename: John C
authors.initials: JC
authors.lastname: Garner
authors.forename: Eric P
authors.initials: EP
authors.lastname: Plaisance
authors.forename: James Kyle
authors.initials: JK
authors.lastname: Taylor
authors.forename: Sofiya
authors.initials: S
authors.lastname: Alhassan
authors.forename: Peter W
authors.initials: PW
authors.lastname: Grandjean
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002784:Cholesterol / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood*; D018592:Cross-Over Studies; D015444:Exercise / Q000502:physiology*; D006801:Humans; D050356:Lipid Metabolism / Q000502:physiology*; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D013997:Time Factors; D014280:Triglycerides / Q000097:blood; D016138:Walking
chemical_list: D008076:Cholesterol, HDL; D014280:Triglycerides; D002784:Cholesterol