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Lipoprotein subfraction changes after continuous or intermittent exercise training.

Thomas S Altena1, Jody L Michaelson, Steven D Ball

  • 1Department of Health, Physical Education, and Recreation, Missouri State University, Springfield, MO 65211, USA.

Medicine and Science in Sports and Exercise
|March 15, 2006
PubMed
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Both continuous (CON-EX) and intermittent (INT-EX) aerobic exercise training improve lipoprotein profiles by lowering total cholesterol and increasing HDL-C subfraction 2. Exercise training enhances LDL particle size, benefiting cardiovascular health.

Area of Science:

  • Exercise Physiology
  • Cardiovascular Health
  • Lipid Metabolism

Background:

  • Aerobic exercise training (TRAIN) is known to influence lipid profiles.
  • Understanding the comparative effects of different exercise modalities on lipoproteins is crucial for public health.
  • Normolipidemic individuals may benefit from exercise interventions to prevent dyslipidemia.

Purpose of the Study:

  • To compare the effects of 4 weeks of intermittent (INT-EX) versus continuous (CON-EX) aerobic exercise on lipid profiles.
  • To analyze changes in total cholesterol (TC), HDL-C, LDL-C, and their subfractions.
  • To assess the impact of exercise training on postprandial lipemia.

Main Methods:

  • 18 untrained individuals (7 males, 11 females) underwent 4 weeks of supervised treadmill jogging.

Related Experiment Videos

  • Exercise protocols included either continuous aerobic exercise (CON-EX) or intermittent aerobic exercise (INT-EX).
  • Fasting plasma samples and postprandial lipemia were measured before and after the training period.

    • Main Results:

    • TRAIN did not significantly alter fasting triglycerides or very LDL-C.
    • Postprandial lipemia remained unchanged in both groups.
    • Combined analysis showed TRAIN decreased TC, total LDL-C, and TC:HDL ratio, while increasing HDL-C subfraction 2 and LDL mean particle size.

    Conclusions:

    • Both CON-EX and INT-EX equally improve lipoprotein profiles in normolipidemic individuals.
    • Exercise interventions effectively lower TC by favorably altering LDL-C subfractions and increasing LDL particle size.
    • Increased HDL-C subfraction 2 concentration is another key benefit of aerobic exercise training.