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* Corresponding author 1 ACTES - Adaptations au Climat Tropical, Exercice et Santé 2 CNMSS - Research Unit National Center of Medicine and Science in Sport 3 Laboratoire de Physiologie des Interactions

Abstract : In order to study the effect of a competitive triathlon season on maximal oxygen uptake VO2max, aerobic power AeP and anaerobic performance AnP of the lower limbs, eight triathletes performed exercise tests after: 1 a pre-competition period Pre-COMP 2 a competitive period COMP, and 3 a low volume and intensity training period Post-COMP. The tests were a vertical jump-and-reach test and an incremental exercise test on a cycle ergometer. Ventilatory data were collected every minute during the incremental test with an automated breath-by-breath system and the heart-rate was monitored using a telemetric system. RESULTS: No changes in VO2max were observed, whereas AeP decreased after Post-COMP compared to Pre-COMP and COMP and AnP decreased during COMP compared to Pre-COMP and Post-COMP. In addition, second ventilatory threshold VT2 and power output at first ventilatory threshold VT1 and VT2 decreased after Post-COMP. CONCLUSION: This study showed that six weeks of low volume and intensity of training is too long a period to preserve adaptations to training, although a stable maximal oxygen uptake throughout the triathlon season was observed. Moreover, the AnP decrease during COMP was probably in relation with the repetitive nature of the training mode and-or triathlon competitions.

Keywords : VO2max ventilatory thresholds maximal aerobic power parameters of performance training triathlon

Autor: Olivier Galy - Karim Chamari - Olivier Costes - Olivier Hue - Laurent Maïmoun - J. Manetta -



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