Effects of intermittent cycle exercise on intramyocellular lipid use and recovery

DOI Web Site 2 Citations
  • Lesley J. White
    Human Performance Laboratory University of New Mexico P.O. Box 118206 Albuquerque New Mexico 87106
  • Robert A. Robergs
    Human Performance Laboratory University of New Mexico P.O. Box 118206 Albuquerque New Mexico 87106
  • Wilmer L. Sibbitt
    Clinical and Magnetic Resonance Research Center University of New Mexico P.O. Box 118206 Albuquerque New Mexico 87106
  • Michael A. Ferguson
    Department of Exercise & Sport Sciences University of Florida P.O. Box 118206 Gainesville Florida 32611
  • Sean McCoy
    Department of Internal Medicine University of New Mexico P.O. Box 118206 Albuquerque New Mexico 87106
  • William M. Brooks
    Clinical and Magnetic Resonance Research Center University of New Mexico P.O. Box 118206 Albuquerque New Mexico 87106

Abstract

<jats:title>Abstract</jats:title><jats:p>The purpose of this investigation was to compare intramyocellular lipid (IMCL) changes in skeletal muscle in nine moderately trained subjects after 45 min of interval cycling and through 1 h of recovery. The exercise session was continous with alternating cycling intensity achieving 50 (3 min) and 110% (2 min) of ventilatory threshold. Spectra from the vastus lateralis were acquired before, immediately after, and 60 min following exercise using a 1.5 T Signa whole‐body magnet (point‐resolved spectroscopy sequence, echo time 60 ms, transverse relaxation time 2000 ms, 128 acquisitions, and 20 mm<jats:sup>3</jats:sup> voxel). Immediately following exercise, IMCI concentration decreased 38% compared to pre‐exercise levels (<jats:italic>P</jats:italic><0.05). Fitness level and baseline IMCL were not correlated with changes in IMCL following exercise (<jats:italic>P</jats:italic>>0.05). In the 60‐min recovery, IMCL was reduced 30% compared to baseline (<jats:italic>P</jats:italic><0.05) and did not recover. In contrast, a nonexercising control group showed no change in IMCL. Our results suggest that IMCL decreased significantly following 45 min of interval cycling, with little recovery in the hour following.</jats:p>

Journal

  • Lipids

    Lipids 38 (1), 9-13, 2003-01

    Wiley

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