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Acute changes in lipoprotein subclasses during exercise.
Esben Søndergaard1, Marianne K Poulsen, Michael D Jensen
1Department of Endocrinology and Internal Medicine, Aarhus University Hospital, DK-8000 Aarhus C, Denmark.
Metabolism: Clinical and Experimental
|October 1, 2013
Summary
Acute exercise significantly alters lipoprotein subclass composition, increasing LDL and HDL particle concentrations. These findings suggest exercise training benefits are mirrored in acute exercise responses.
Area of Science:
- Exercise Physiology
- Lipid Metabolism
- Cardiovascular Health
Background:
- Lipids are crucial substrates for energy during fasting and exercise.
- Previous research indicates exercise training improves lipoprotein subclass composition.
- The immediate impact of exercise on triglyceride (TG) concentration and lipoprotein subclasses is not fully understood.
Purpose of the Study:
- To investigate the acute effects of exercise on TG concentration and lipoprotein subclass composition.
- To determine if acute exercise elicits changes in lipoprotein subclasses similar to exercise training.
Main Methods:
- Sixteen healthy, lean adults (8 men, 8 women) aged 20-30 years participated.
- Subjects underwent 90 minutes of cycling at 50% VO2peak under basal fasting conditions.
- Lipoprotein subclass composition was analyzed using 1H NMR spectroscopy.
Main Results:
- During exercise, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) particle concentrations increased significantly (p<0.05).
- Total TG concentration decreased, while VLDL particle size shifted towards smaller particles in men (p<0.05).
- VLDL-TG concentration remained unchanged despite exercise.
Conclusions:
- Acute exercise induces favorable alterations in lipoprotein subclass profiles.
- These immediate changes observed during exercise resemble the long-term adaptations seen with regular exercise training.
Keywords:
(1)H NMR(1)H NMR spectroscopyBMIBody mass indexCVDCardiovascular diseaseDEXADual X-ray absorptiometryFFAFree fatty acidsHDLHigh density lipoproteinIDLIntermediate density lipoproteinLDLLPLLipoprotein lipaseLow density lipoproteinNuclear Magnetic ResonancePeak oxygen uptakeTGTriglycerideVLDLVO2peakVery low-density lipoprotein
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