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Published in: European Journal of Applied Physiology 5-6/2005

01-12-2005 | Original Article

Effect of training on GH and IGF-1 responses to a submaximal exercise in football players

Authors: S. Mejri, F. Bchir, MC Ben Rayana, J. Ben Hamida, C. Ben Slama

Published in: European Journal of Applied Physiology | Issue 5-6/2005

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Abstract

To study the effects of regular football training on basal and exercise induced levels of growth hormone (GH) and insulin-like growth factor (IGF-1), 13 young football players were investigated by a submaximal exercise at the beginning of the sporting season in October (S1), at the middle of the season in January (S2) and at the end in May (S3). At each session, an exercise test on an ergogycle was performed for 25 min, beginning with an incremental exercise to reach 90% of theoretical maximal heart, which was maintained for the last 10 min of the test. Venous blood samples were collected at rest, at the end of the exercise and at 30 and 60 min during the recovery period. Plasma lactate and glucose concentrations increased during exercise with no difference found between sessions. GH level increased with exercise at each session but the response was significantly higher in S1 than in S2 and S3 (P<0.01). The GH area under the curve decreased significantly all along the football season (P<0.01); the IGF-1 level did not significantly change during exercise nor with training. Basal insulin-like growth factor binding protein-3 (IGFBP3) remained stable during the three sessions. Football training decreased significantly the exercise-stimulated GH levels all along the football season but did not have any significant effect on IGF-1 levels or on basal IGFBP3 levels.
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Metadata
Title
Effect of training on GH and IGF-1 responses to a submaximal exercise in football players
Authors
S. Mejri
F. Bchir
MC Ben Rayana
J. Ben Hamida
C. Ben Slama
Publication date
01-12-2005
Publisher
Springer-Verlag
Published in
European Journal of Applied Physiology / Issue 5-6/2005
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-005-0007-6

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