Premium
Effects of intermittent cycle exercise on intramyocellular lipid use and recovery
Author(s) -
White Lesley J.,
Robergs Robert A.,
Sibbitt Wilmer L.,
Ferguson Michael A.,
McCoy Sean,
Brooks William M.
Publication year - 2003
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/s11745-003-1024-x
Subject(s) - medicine , endocrinology , cycling , skeletal muscle , exercise physiology , high intensity interval training , interval training , vastus lateralis muscle , ventilatory threshold , chemistry , vo2 max , heart rate , archaeology , history , blood pressure
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 3 voxel). Immediately following exercise, IMCI 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.