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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Effect of energy expenditure and training status on leptin response to sub-maximal cycling
Journal of Sports Science and Medicine, Volume 8, No. 2, Year 2009
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Description
We examined the leptin response and related hormones during and after two sub-maximal exercise protocols in trained and untrained subjects. During this study, plasma concentrations of leptin [Lep], insulin [I], cortisol [C], growth hormone [GH], glucose [G] and lactate [La] were measured. 7 elite volleyball trained players (TR) and 7 untrained (UTR) subjects (percent body fat: 13.2 ± 1.8 versus 15.7 ± 1.0, p < 0.01, respectively) were examined after short and prolonged sub-maximal cycling exercise protocols (SP and PP). Venous blood samples were collected before each protocol, during, at the end, and after 2 and 24 h of recovery. SP and PP energy expenditures ranged from 470 ± 60 to 740 ± 90 kcal for TR and from 450 ± 60 to 710 ± 90 kcal for UTR, respectively. [Lep] was related to body fat percentage and body fat mass in TR (r = 0.84, p < 0.05 and r = 0.93, p < 0.01) and in UTR (r = 0.89, p < 0.01 and r = 0.92, p < 0.01, respectively). [Lep] did not change significantly during both protocols for both groups but was lower (p < 0.05) in all sampling in TR when compared to UTR. Plasma [I] decreased (p < 0.01) and [GH] increased (p < 0.01) significantly during both SP and PP and these hormones remained lower (I: p < 0.01) and higher (GH: p < 0.01) than pre-exercise levels after a 2-h recovery period, returning to base-line at 24-h recovery. Plasma [La] increased (p < 0.01) during both protocols for TR and UTR. There was no significant change in [C] and [G] during and after both protocols for all subjects. It is concluded that 1) leptin is not sensitive to acute short or prolonged sub-maximal exercises (with energy expenditure under 800 kcal) in volleyball/anaerobically trained athletes as in untrained subjects, 2) volleyball athletes showed significantly lower resting and exercise leptin response with respect to untrained subjects and 3) it appears that in these anaerobically trained athletes leptin response to exercise is more sensitive to the level of energy expenditure than hormonal or metabolic modifications induced by acute exercise. © Journal of Sports Science and Medicine.
Authors & Co-Authors
Bouassida, Anissa
Tunisia, Sousse
Faculty of Medicine Sousse
Chatard, J. C.
Qatar, Doha
Aspire Academy
Chamari, K.
Tunisia, Tunis
République Tunisienne Ministère de la Jeunesse, Des Sports et de L'éducation Physique
Zaouali, Monia Ajina
Tunisia, Sousse
Faculty of Medicine Sousse
Feki, Youssef
Tunisia
Laboratoire Des Sciences de Mesures et D'explorations Fonctionnelles
Gharbi, Najoua
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Zbidi, Abdelkarim
Tunisia, Sousse
Faculty of Medicine Sousse
Tabka, Zouhaïr
Tunisia, Sousse
Faculty of Medicine Sousse
Statistics
Citations: 8
Authors: 8
Affiliations: 5
Identifiers
e-ISSN:
13032968
Research Areas
Health System And Policy
Noncommunicable Diseases