Influence of endurance running and recovery diet on intramyocellular lipid content in women: a 1H NMR study.

Academic Article

Abstract

  • Using a randomly assigned crossover design, we evaluated the change in intramyocellular lipid stores (IMCL) from baseline after a 2-h treadmill run [67% of maximal oxygen uptake (VO2 max)] and the recovery of IMCL in response to a postexercise very low-fat (10% of energy, LFAT) or moderate-fat (35% of energy, MFAT) recovery diet in seven female runners. IMCL was measured in soleus muscle by use of water-suppressed 1H-NMR spectroscopic imaging before (baseline), after, and approximately 22 h and 70 h after the run. IMCL fell by approximately 25% (P < 0.05) during the endurance run and was dependent on dietary fat content for postexercise recovery (P = 0.038, diet x time interaction). Consumption of the MFAT recovery diet allowed IMCL stores to return to baseline by 22 h and to overshoot (vs. baseline) by 70 h postexercise. In contrast, consumption of the LFAT recovery diet did not allow IMCL stores to return to baseline even by 70 h after the endurance run (P < 0.01 at 70 h). These results suggest that a certain quantity of dietary fat is required to replenish IMCL after endurance running.
  • Authors

    Keywords

  • Adult, Blood, Bone Marrow, Cross-Over Studies, Diet, Fat-Restricted, Female, Hormones, Humans, Lipid Metabolism, Magnetic Resonance Spectroscopy, Muscle, Skeletal, Physical Endurance, Protons, Running, Single-Blind Method, Time Factors
  • Digital Object Identifier (doi)

    Author List

  • Larson-Meyer DE; Newcomer BR; Hunter GR
  • Start Page

  • E95
  • End Page

  • E106
  • Volume

  • 282
  • Issue

  • 1