37 research outputs found
Salbutamol effects on systemic potassium dynamics during and following intense continuous and intermittent exercise
Projet MUSE : Élaboration d’une approche globale des populations vulnérables vis-à -vis de la qualité de l’air intégrant les nouvelles technologies
Intérêt d’une démarche pluridisciplinaire associant pneumologue, conseiller habitat santé et mycologue dans la prise en charge des patients atteints de pneumopathie d’hypersensibilité
Intégration innovante d’un diagnostic de la qualité de l’air intérieur et d’une approche éducative au domicile des patients vulnérables respiratoires
Preserved Bone Health in Adolescent Elite Rhythmic Gymnasts despite Hypoleptinemia
International audienceBackground/ Aims: Leptin is linked to hormonal disturbances occurring in anorexia and positively linked with bone mineral density. The aim of this study was to determine whether hypoleptinemia occurring in rhythmic gymnasts may affect bone health. Method: Leptin, insulin, cortisol, IGF1 levels and bone markers were determined in 36 rhythmic gymnasts (EG) and 20 controls (C). Body composition, BMD at the whole body (WBBMD), lumbar spine (LSBMD) and bone ultrasound properties (SOS, BUA) were measured. Results: The rhythmic gymnasts had lower fat mass and leptin level than the controls. There was no difference for IGF1, cortisol and insulin levels. Bone turnover rate was higher in elite gymnasts. The uncoupling index showed that remodeling favored the bone formation. LSBMD, WBBMD, SOS and BUA were higher in elite gymnasts after adjustment for fat mass. Leptin correlated positively with fat mass and negatively with physical activity. Conclusion: High impact training is able to counterbalance bone effects usually encountered in hormonally disturbed subjects. Our results suggest that hypoleptinaemia might be related to direct osteogenic effects and indirect hormonal mechanisms including preservation of IGF and cortisol levels