title: The effect of endurance exercise training on plasma lipoprotein AI and lipoprotein AI:AII concentrations in sedentary adults.
abstract: The effect of 6 months of endurance exercise training on plasma concentrations of lipoprotein (Lp)AI and LpAI:AII was determined in 39 sedentary subjects (17 men, 22 women, average age, 57 years) with abnormal cholesterol concentrations (total cholesterol [TC] > 200 mg/dL, or high-density lipoprotein-cholesterol [HDL-C] < 35 mg/dL). Following exercise training, plasma LpAI concentrations increased (+5.9 +/- 1.2 mg/dL; P <.001), but there was no change in total apolipoprotein (apo) A-I or LpAI:AII concentrations. The change in plasma LpAI concentration was positively correlated to changes in total HDL-C (r =.495, P =.001), the sum of HDL4-C(nmr) + HDL5-C(nmr) (r =.417, P =.008), and average HDL particle size (r =.415, P =.009), but not to changes in body composition or Vo2max. In the 8 subjects with the greatest change in LpAI concentration following training, the size distribution of LpAI and LpAI:AII particles in plasma also was measured before and after training. In these subjects, the size distribution of LpAI:AII particles did not change with training, but there was a significant increase (0.1 nm; P =.048) in the peak size of the "medium" (7.8 to 9.8 nm) LpAI particles after training. In 7 subjects who served as age- and weight-matched sedentary controls, plasma concentrations of total apo A-I, the LpAI and LpAI:AII subfractions, and plasma lipoprotein-lipids did not differ significantly between baseline and final testing. These data indicate that endurance exercise training increases the average size and plasma concentrations of LpAI, but not LpAI:AII, particles, which may represent possible enhancements of reverse cholesterol transport and may provide insight into the role that exercise plays in reducing cardiovascular disease risk.
authors.affiliation: Department of Kinesiology, University of Maryland College Park, College Park, MD, USA.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Wilund
authors.forename: Perry L
authors.initials: PL
authors.lastname: Colvin
authors.forename: Dana
authors.initials: D
authors.lastname: Phares
authors.forename: Andrew P
authors.initials: AP
authors.lastname: Goldberg
authors.forename: James M
authors.initials: JM
authors.lastname: Hagberg
mesh_terms: D000368:Aged; D002352:Carrier Proteins / Q000032:analysis; D053480:Cholesterol Ester Transfer Proteins; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D015444:Exercise; D005260:Female; D006023:Glycoproteins; D006801:Humans; D017270:Lipoprotein(a) / Q000031:analogs & derivatives* / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010316:Particle Size; D010807:Physical Endurance; D002785:Sterol O-Acyltransferase / Q000378:metabolism
chemical_list: C506642:CETP protein, human; D002352:Carrier Proteins; D053480:Cholesterol Ester Transfer Proteins; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D006023:Glycoproteins; D017270:Lipoprotein(a); C106575:lipoprotein A-II; C078260:lipoprotein A-I; D002785:Sterol O-Acyltransferase