Effects of a brisk walk on lipoprotein lipase activity and plasma triglyceride concentrations in the fasted and postprandial states

Eur J Appl Physiol. 2003 Apr;89(2):184-90. doi: 10.1007/s00421-002-0788-9. Epub 2003 Feb 7.

Abstract

This study aimed to determine whether changes in plasma heparin-releasable lipoprotein lipase (LPL) activity following a brisk walk were associated with decreases in fasting and/or postprandial triglyceride (TG) concentrations. Two groups of pre-menopausal women participated. In one group (fasting study group, n=10), TG concentrations and post-heparin plasma LPL activity were measured in the fasted state on two occasions: approximately 18 h after a 2-h treadmill walk at 50% maximal oxygen uptake (exercise trial); and after a day of no exercise (control trial). The other group (postprandial study group, n=9) undertook two oral fat tolerance tests (blood samples taken fasting and for 6 h after a high-fat meal), with plasma LPL activity measured 6 h after meal ingestion. Pre-conditions were the same as for the fasting study group (i.e. control and prior exercise). Prior exercise reduced fasting TG concentrations by 23 (7)% (fasting study group) [mean (SEM)] and by 18 (9)% (postprandial study group) (both P<0.05), and the postprandial TG response by 23 (6)% (postprandial study group) (P<0.01). Plasma LPL activity was not significantly increased by exercise in either the fasting or postprandial study groups. However, exercise-induced changes in both fasting and postprandial LPL activity were significantly correlated with the respective exercise-induced changes in fasting TG concentration and the postprandial TG response (r=-0.70 and -0.77 respectively, P<0.05 for both). These data suggest that increased LPL activity may contribute to the hypotriglyceridaemic effect of moderate exercise, although other mechanisms are also likely to be involved.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Energy Metabolism
  • Fasting / metabolism*
  • Female
  • Heparin / pharmacology
  • Humans
  • Lipoprotein Lipase / metabolism*
  • Osmolar Concentration
  • Oxygen Consumption
  • Postprandial Period / physiology*
  • Time Factors
  • Triglycerides / blood*
  • Walking / physiology*

Substances

  • Triglycerides
  • Heparin
  • Lipoprotein Lipase