title: Habitual consumption of eggs does not alter the beneficial effects of endurance training on plasma lipids and lipoprotein metabolism in untrained men and women.
abstract: Changes in plasma lipid and apolipoprotein profiles were evaluated in 12 healthy, unfit subjects (VO(2peak) 39.1+/-2.8 ml.kg(-1).min(-1); 5 women, 7 men) at baseline and following endurance exercise training. The exercise protocol consisted of a 6-week endurance exercise training program (4-5 days week(-1); 60 min.session(-1); > or =65% HR(max)). Subjects were randomly assigned to consume an egg- (n=6; 12 eggs.week(-1)) or no-egg (n=6; 0 eggs.week(-1))-based, eucaloric, standardized diet for 8 weeks. Both diets were macronutrient balanced [60% carbohydrate, 30% fat, 10% protein (0.8 g.kg(-1).day(-1))] and individually designed for weight maintenance. Plasma lipids were measured twice within the same week at baseline and following exercise training. At baseline, subjects were normolipidemic with values of 163.9+/-41.8, 84.8+/-36.7, 60.6+/-15.4 and 93.1+/-52 mg dl(-1) for total cholesterol, LDL cholesterol and HDL cholesterol and triglyceride concentrations, respectively. A two-way ANOVA was used to analyze diet and exercise effects and interactions. In both groups, endurance exercise training resulted in a significant 10% increase in HDL-C (P<.05), a 19% decrease in Apo B concentrations (P<.05) and reductions in plasma CETP activity (P<.05). Plasma LDL-C decreased by 21% (P=.06). No main effects of diet or interactions with plasma lipids or Apo B concentrations were observed. These data demonstrate that endurance training improved the plasma lipid profiles of previously unfit, normolipidemic subjects independent of dietary cholesterol intake from eggs.
authors.affiliation: Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA.
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Vislocky
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Pikosky
authors.forename: Kristin Herron
authors.initials: KH
authors.lastname: Rubin
authors.forename: Sonia
authors.initials: S
authors.lastname: Vega-López
authors.forename: P Courtney
authors.initials: PC
authors.lastname: Gaine
authors.forename: William F
authors.initials: WF
authors.lastname: Martin
authors.forename: Tosca L
authors.initials: TL
authors.lastname: Zern
authors.forename: Ingrid E
authors.initials: IE
authors.lastname: Lofgren
authors.forename: Maria Luz
authors.initials: ML
authors.lastname: Fernandez
authors.forename: Nancy R
authors.initials: NR
authors.lastname: Rodriguez
mesh_terms: D000293:Adolescent; D000328:Adult; D008076:Cholesterol, HDL / Q000378:metabolism; D008078:Cholesterol, LDL / Q000378:metabolism; D004032:Diet; D004531:Eggs; D015444:Exercise; D005260:Female; D006801:Humans; D008055:Lipids / Q000097:blood*; D008074:Lipoproteins / Q000378:metabolism*; D008297:Male; D010100:Oxygen / Q000378:metabolism; D010807:Physical Endurance; D014280:Triglycerides / Q000097:blood
chemical_list: D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D008055:Lipids; D008074:Lipoproteins; D014280:Triglycerides; D010100:Oxygen