Variabilité de la fréquence cardiaque en fonction de l'intensité de la pratique physique chez la femme ménopausée

Aim. – Study was to asses the heart rate variability related to the physical practice intensity in post menopausal women.Method. – Time domain measurement of heart rate variability has been realised from the electrocardiogram at rest and during exercice in 3 groups of 6 women : untrained, active and trained. At rest, no significant difference betwen groups appears. But, in the standing position, RR interval and the dispersion around RR interval decrease in trained group only. During submaximal exercise, this dispersion is more elevated in active and trained groups.Conclusion. – Physical practice induces a higher response of sinus node to vagal modulation during standing position and submaximal exercise.     

Exigences physiologiques nécessaires à la pratique de rugby de haut niveau

Introduction – The objective of our work is to determine physiological features of rugby players of French team.Synthesis of facts – We realized the physical tests for estimate of maximal oxygen uptake (VO₂max), lactate anaerobic, Sargent, explosive strength on ergojump and supple. The results showed that aerobic power and lactate anaerobic were favourable of back. The performances of back of ergojump and Sargent were better than these forward. It not existed significant difference of supple between forward and black.Conclusion – The physical tests bring to the fore different athletes not only on the morphological and metabolic plane but also on the powerful and supple plane.     

La chute de l’érythropoïétine sérique,indice de dopage antérieur,s’observe aussi après exposition à la haute altitude

Summary. – Seric erythropoietin concentration (sEPO) is considered as one of the indicators of doping in subjects who have received recombinant human EPO 10 to 15 days earlier. The aim of this work was to verify if that phenomenon occurs after exposure to high altitude (6,893 m).Methods and results. – Blood samples were collected before and then 10 and 102 days after the expedition. sEpo decreased by 69% on day 10 before returning to control values on day 102.Conclusion. – These results, therefore, suggest that anti-doping control have to carefully take into account this phenomenon and that both direct and indirect markers are needed.