Diet and short term plasma lipoprotein-lipid changes after exercise in trained men

To test the effect of diet on the short-term lipid response to exercise, fo urteen moderately trained ((V) over dot O-2max: 50.2 +/- 6.7 ml/kg/min), he althy men (mean age: 28 +/- 4 years) were alternately fed a high fat (60 +/ - 6.7% fat) and a high carbohydrate (63 +/- 3.2% carbohydrate) isoenergetic diet for 2 weeks in a randomized crossover design. During the last 4 days of the treatments, fasting total cholesterol, triglyceride, HDL-cholesterol , and HDL3-cholesterol were measured the day before, and again immediately, 24 hr, and 48 hr after exercise (4190 kJ, 70% (V) over dot O-2max) LDL-cho lesterol and HDL2-cholesterol were calculated. Lipid concentrations were ad justed for plasma volume changes after exercise. A 2 (diet) X 4 (time) ANOV A with repeated measures revealed no significant interaction between the di et and exercise treatments. Furthermore, diet alone did not influence lipid concentrations in these trained men. Exercise resulted in an increase in H DL-C (10.7%) and HDL3-C (8.5%) concentrations and a concomitant fall in tri glyceride (-25%) and total cholesterol (-3.5%). Thus, we conclude that diet composition does not affect the short-term changes in blood lipids and lip oproteins that accompany a single session of aerobic exercise in moderately trained men.