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Articles in PresS, published online ahead of print April 2, 2002
Am J Physiol Endocrinol Metab, 10.1152/ajpendo.00567.2001
Submitted on January 7, 2002
Accepted on March 27, 2002
1 Health and Kinesiology, University of Texas at San Antonio, San Antonio, Texas, USA
2 Nutritional Sciences, University of Missouri-Columbia, Columbia, Missouri, USA
3 Educational Counseling and Psychology, University of Missouri-Columbia, Columbia, Missouri, USA
4 Pharmacology, University of Missouri-Columbia, Columbia, Missouri, USA
* To whom correspondence should be addressed. E-mail: jzhang{at}utsa.edu.
We investigated the time course of exercise-induced lipoprotein lipase activity (LPLa) and reverse cholesterol transport (RCT) during 24 h post-exercise period. Subjects were 10 sedentary normolipidemic males (NTG) (fasting triglyceride (TG)=89.1±8.6 mg/dl) and 6 hyperlipidemic males (HTG) (fasting TG=296.8±64.0 mg/dl). Each subject performed a control trial (no exercise), and 4 exercise trials. In the exercise trials, a subject jogged on a treadmill at 60% of his maximal O2 consumption for 1 h. Pre- and post-heparin blood samples were taken before exercise (baseline), and at 4, 8, 12, and 24 h after exercise. There was no group difference in LPLa (p>0.05) over the time points. When the LPLa data from the two groups were combined, LPLa at 24 h after exercise was higher than baseline, or 4, 8, 12 h after exercise (p<0.05). Plasma TG and lecithin:cholesterol acyltransferase activity (LCATa) were higher in HTG than NTG and the total high-density lipoprotein cholesterol (HDLtot-Chol) was lower in HTG than NTG (p<0.05). HDL2-Chol, LCATa, and cholesterol ester transfer protein activity did not differ during 24 h post exercise period (p>0.05). These results suggest that LPLa is still increasing 24 h after an acute aerobic exercise and the magnitude of the increase in exercise induced LPLa in HTG was similar to that in NTG. Furthermore, in sedentary population with or without HTG the variables related to RCT do not change during 24 h period after exercise.
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