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Updated: Jul 24, 2026

Evaluation of Blood Lactate and Plasma Insulin During High-intensity Exercise by Antecubital Vein Catheterization
04:28

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Published on: May 18, 2018

Plasma lipid and lipoprotein responses during exercise.

M A Ferguson1, N L Alderson, S G Trost

  • 1Department of Exercise Science, University South Carolina, Columbia, SC, USA. secchamps98@yahoo.com

Scandinavian Journal of Clinical and Laboratory Investigation
|May 6, 2003
PubMed
Summary

Prolonged exercise significantly alters plasma lipid and lipoprotein concentrations during the activity itself. Specific energy expenditure thresholds during exercise trigger changes in low-density lipoprotein cholesterol (LDL-C) and total cholesterol.

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Area of Science:

  • Exercise Physiology
  • Cardiovascular Health
  • Biochemistry

Background:

  • Plasma lipid and lipoprotein profiles are critical indicators of cardiovascular risk.
  • Acute exercise effects on lipids are typically observed days post-activity.
  • Understanding in-exercise changes provides novel insights into metabolic responses.

Purpose of the Study:

  • To investigate the impact of prolonged exercise on plasma lipid and lipoprotein levels.
  • To pinpoint specific energy expenditure (caloric) thresholds during exercise where these changes occur.
  • To differentiate between in-exercise and post-exercise lipoprotein alterations.

Main Methods:

  • Eleven active males performed treadmill running at 70% VO2max, expending 6278.7 kilojoules (Kj).
  • Blood samples were collected at 1000 kcal intervals during exercise, up to 1500 kcal.
  • Adjustments for plasma volume changes were applied to analyze lipid and lipoprotein concentrations.

Main Results:

  • Decreases in low-density lipoprotein cholesterol (LDL-C) were noted at 1100 and 1300 kcal expenditures during exercise.
  • Total cholesterol significantly decreased at 1100, 1300, and 1400 kcal of exercise.
  • High-density lipoprotein cholesterol (HDL-C) and HDL2-C concentrations increased immediately post-exercise.

Conclusions:

  • Plasma lipoprotein concentrations can change during acute, prolonged exercise, not just in the days following.
  • A minimum exercise threshold appears necessary to induce these in-exercise lipoprotein modifications.
  • Further research is needed to elucidate the mechanisms (e.g., lipoprotein lipase) responsible for these during-exercise changes.