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DOI: 10.1055/s-2003-39051
Post-Exercise Increase of Lipid Oxidation after a Moderate Exercise Bout in Untrained Healthy Obese Men
Publication History
Received 28 February 2002
Accepted after revision 19 August 2002
Publication Date:
07 May 2003 (online)
![](https://www.thieme-connect.de/media/hmr/200302/lookinside/thumbnails/10.1055-s-2003-39051-1.jpg)
Abstract
The aim of the study was to examine whether a moderate exercise increases the utilization of fatty acids during the recovery period in obese men. Six healthy obese participated in a randomized crossover investigation, one with exercise and one without exercise. At 8 a. m., the subjects had a standardized breakfast and they rested in a sitting position for 3 hours. The subjects were maintained in the sitting position for 4 additional hours in one session. In a second session, they exercised for 60 min at 50 % of their V˙O2 max and then returned to the sitting position for 3 hours. Respiratory exchange ratio (RER) values were calculated by indirect calorimetry. During the resting session, plasma non-esterified fatty acids (NEFA) and glycerol concentrations rose progressively, whereas RER progressively decreased. During the exercise, plasma catecholamines, NEFA, glycerol, growth hormone and cortisol levels and RER increased while insulin decreased. During the recovery, plasma NEFA increased and glycerol decreased. During the first hour of recovery, RER values were lower and fatty acid utilization higher than during the same period of the resting session. The study shows that exercise induces modifications in hormonal factors promoting lipid mobilization and suggests that exercise provide substantial amounts of NEFA for muscle oxidation during recovery from an exercise bout in obese subjects.
Key words
Respiratory Exchange Ratio - Fat Oxidation - Exercise - Post-Exercise Recovery - Non-Esterified Fatty Acids - Lipid Mobilization - Fat Oxidation
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Dr. M. Berlan
INSERM U 586 · Laboratoire de Pharmacologie Médicale et Clinique
Faculté de Médecine · 37 Allées Jules Guesde · 31073 Toulouse cedex · France
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Email: berlan@cict.fr