Effects of intermittent cycle exercise on intramyocellular lipid use and recovery

White, Lesley J., Robergs, Robert A., Sibbitt Jr., Wilmer L., Ferguson, Michael A., McCoy, Sean, & Brooks, William M. (2003) Effects of intermittent cycle exercise on intramyocellular lipid use and recovery. Lipids, 38(1), pp. 9-13.

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Abstract

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 continuous 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 mm3 voxel). Immediately following exercise, IMCL concentration decreased 38% compared to pre-exercise levels (P < 0.05). Fitness level and baseline IMCL were not correlated with changes in IMCL following exercise (P > 0.05). In the 60-min recovery, IMCL was reduced 30% compared to baseline (P < 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.

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13 citations in Scopus
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10 citations in Web of Science®

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ID Code: 96876
Item Type: Journal Article
Refereed: Yes
Keywords: Exercise equipment; Magnets; Muscle, Intramyocellular lipids, Lipids, lipid, adult; article; cell level; controlled study; cycling; exercise; fitness; human; human cell; human experiment; human tissue; muscle cell; muscle level; muscle relaxation; normal human; skeletal muscle; spectroscopy; vastus lateralis muscle, Adult; Anaerobic Threshold; Exercise; Exercise Test; Humans; Lipid Metabolism; Magnetic Resonance Spectroscopy; Male; Muscle, Skeletal; Musculoskeletal Physiology; Pulmonary Ventilation
DOI: 10.1007/s11745-003-1024-x
ISSN: 1558-9307
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Exercise & Nutrition Sciences
Deposited On: 25 Jul 2016 02:05
Last Modified: 25 Jul 2016 02:05

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