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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Effect of Ramadan fasting on fuel oxidation during exercise in trained male rugby players
Diabetes and Metabolism, Volume 32, No. 6, Year 2006
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Description
Purpose: The aim of this study was to assess the effect of Ramadan fasting on substrate oxidation in trained athletes during moderate-intensity exercise. Methods: Nine trained men (age: 192 yr, Height: 1.780.74 m) were tested on three occasions: during a control period immediately before Ramadan (C), at the end of the first week (Beg-R), and during the fourth week of Ramadan (End-R). On each occasion, they performed submaximal cycle ergometer exercise, with work-rates that were increased progressively (loadings corresponding to 20, 30, 40, 50, 60% of Wmax). Steady-state substrate oxidation was evaluated by indirect calorimetry. Results: Participants showed significant decreases in body mass and body fat at the end of Ramadan, relative to initial control values (P<0.001). The daily food intake was also reduced during Ramadan (P<0.01). Haemoglobin concentrations and hematocrit were significantly higher at the end-Ramadan, both at rest (P<0.001 and P<0.0001 respectively) and after exercise, (P<0.05 and P<0.01 respectively) compared to control measurements made before Ramadan. At the end of Ramadan, our subjects had increased their fat utilization during exercise. The cross-over was observed at a higher intensity at the End-R (35% vs. 30% of Wmax, P<0.001). For the same power output, the Lipox max was also higher at the End-R, compared to control value (26538 vs. 199.120 mg/min, P<0.001). Conclusion: Ramadan fasting increases the lipid oxidation of trained athletes during submaximal exercise. The increased fat utilisation may be related to decreases in body mass and body fat content. © 2006. Elsevier Masson SAS. All rights reserved.
Authors & Co-Authors
Bouhlel, Ezdine
Tunisia, Tunis
République Tunisienne Ministère de la Jeunesse, Des Sports et de L'éducation Physique
Tunisia, Sousse
Faculty of Medicine Sousse
Salhi, Z.
Tunisia, Sousse
Faculty of Medicine Sousse
Bouhlel, H.
Tunisia, Tunis
République Tunisienne Ministère de la Jeunesse, Des Sports et de L'éducation Physique
Mdella, S.
Tunisia, Sousse
Faculty of Medicine Sousse
Amamou, A.
Tunisia, Sousse
Faculty of Medicine Sousse
Zaouali, Monia Ajina
Tunisia, Sousse
Faculty of Medicine Sousse
Mercier, Jacques G.
France, Montpellier
Université de Montpellier
Bigard, X.
France, La Tronche
Le Centre de Recherche du Service de Santé Émile Pardé
Tabka, Zouhaïr
Tunisia, Sousse
Faculty of Medicine Sousse
Zbidi, Abdelkarim
Tunisia, Sousse
Faculty of Medicine Sousse
Shephard, Roy
Canada, Toronto
University of Toronto
Statistics
Citations: 126
Authors: 11
Affiliations: 5
Identifiers
Doi:
10.1016/S1262-3636(07)70317-8
ISSN:
12623636
Research Areas
Food Security
Participants Gender
Male