Effets de l'entraînement de sprint et du désentraînement sur les variations du volume plasmatique induites par un test supramaximal chez des adolescents Effects of sprint training and detraining on plasma volume variations induced by supramaximal exercise in adolescent boys

Aim. – The aim of this study was to investigate the effects of a 6 months sprint training program followed by 5 months of detraining on cycling peak performance and plasma volume variations after a 6 s cycle sprint in adolescent boys. Method. – Twelve adolescent boys (training group [TG], n = 6; control group [CG], n = 6) were included in the present study. TG participated in 6 months of a supervised sprint training program (2–3 days/week) and has no training past, whereas CG continued with their normal activity. A 6 s-sprint test on cycle ergometer was performed before training (P1) and after training (P2) in both groups. TG only performed a 6 s-sprint test after 5 months of detraining (P3). Hematocrit (Ht) and plasma lactate concentration were assessed at rest, immediately after the warm-up and the 6 s-sprint and after five and 20 minutes of recovery.