Activité physique et remodelage osseux : étude chez une population de jeunes gymnastesPhysical exercise and bone turnover: a study in young girl gymnasts |
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| Authors: | C Jaffr D Courteix G Dine P Delamarche C L Benhamou |
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| Institution: | a Laboratoire de physiologie et de biomécanique de l'exercice musculaire, université Rennes 2-UFRAPS Campus La Harpe, CS 24414, 35044 Rennes cedex, France;b laboratoire de la performance motrice, UFR STAPS, université d'Orléans, BP 6237, 45062 Orléans cedex 2, France;c institut de prévention et de recherche sur l'ostéoporose Inserm-unité 0 101 ERIT-M, CHR Orléans, 1, rue Porte Madeleine, BP 2439, 45032 Orléans cedex 1, France;d université biotechnologique, 10000 Troyes, France |
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| Abstract: | Aims – Intensive exercise is known to improve the bone mass acquisition. One of the main explanations consists in the mechanical strains exerted on the skeleton. Little is known about the effects of physical exercise on the bone remodelling process.Methods and results – The bone remodelling rate evaluated in a group of young female (24 gymnasts and 21 controls), using a bone resorption marker, the CrossLaps peptides CTx. We measured in our subjects the bone mineral density at the whole body and at six regional sites. The bone density was statistically higher in the gymnasts compared to the controls at all the specific sites. The CTx level corrected by urinary creatinine was significantly higher in the gymnasts, reflecting a faster bone remodelling rate.Conclusion – Intensive physical activity could improve the bone mineral acquisition probably by a stimulation of the bone remodelling activity. |
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| Keywords: | Mots-clé: activité physique croissance CrossLaps densité minérale osseuseMots-clé: bone mineral density CrossLaps growth physical activity |
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