Energy replacement using glucose does not increase postprandial lipemia after moderate intensity exercise.
Chih-Hui Chiu, Stephen Francis Burns, Tsung-Jen Yang
1Graduate Institute of Sports and Health Management, National Chung Hsing University, Taichung, Taiwan. psclw@dragon.nchu.edu.tw.
Lipids in Health and Disease
|November 27, 2014
Summary
Aerobic exercise effectively lowers postprandial triglycerides (TG). Replacing energy after exercise did not alter this TG-lowering effect, nor did it impact related gene expression.
Area of Science:
- Exercise Physiology
- Metabolic Health
- Molecular Biology
Background:
- Aerobic exercise is known to reduce postprandial triglyceride (TG) levels.
- The specific impact of exercise-induced energy deficits on postprandial lipemia remains unclear.
- Investigating the effects on cellular mechanisms is crucial for understanding metabolic responses.
Purpose of the Study:
- To investigate the effect of aerobic exercise on postprandial lipemia.
- To determine if energy replacement after exercise influences postprandial lipemia.
- To examine the impact of exercise on the expression of genes related to lipoprotein metabolism.
Main Methods:
- Nine healthy males participated in three trials: rest (CON), exercise (EX), and exercise with glucose replacement (EXG).
- Exercise involved 60 minutes of treadmill walking at 50% VO2peak.
- Postprandial lipemia and peripheral blood mononuclear cell (PBMC) mRNA expression were assessed after a high-fat meal on the following day.
Main Results:
- Both exercise trials (EX and EXG) significantly reduced total and incremental TG AUC compared to the control (CON) trial.
- No significant difference in TG reduction was observed between the exercise with and without energy replacement trials.
- No significant differences in mRNA expression of VLDL receptor, LDL receptor, or HMGCR were found among the trials.
Conclusions:
- Moderate-intensity aerobic exercise effectively reduces postprandial triglyceride concentrations.
- Energy replacement with glucose does not alter the triglyceride-lowering effect of exercise.
- Exercise does not significantly affect the PBMC mRNA expression of HMGCR, VLDL, or LDL receptors.
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