Aerobic training program for the enhancements of HR and VO₂ off-kinetics in elite judo athletes

Aim. The purpose of this study was to investigate the physiologic and performance changes with the addition of high-intensity interval training (HIIT) to a traditional judo programme. Methods. Nine elite judokas (6 males and 3 females; age: 20±4 yrs; body mass: 69±2 kg; height: 172±7 cm; judo practice time: 13±6 yrs; weekly training volume: 13±5 hours, mean±SD) were recruited to perform a 12-week speciic aerobic training program, which consisted of 2 session/week of 30-min continuous run at 60% at Vmax and one session/week of high-intensity interval training 15x1-min at 90% of Vmax with 1 min of active recovery at 60% of Vmax. Before and after the intervention all athletes performed a graded maximal exercise Test to measure maximal oxygen consumption (VO₂max), ventilatory threshold (VT), maximal velocity (Vmax), heart rate (HR) and VO2 off kinetics. VO2 and HR recovery kinetics were evaluated on a breath-by-breath basis using a single component exponential function. Anaerobic capacity during speciic movements was assessed with the Special judo itness Test (SJFT). Results. The maximal speed reached during the maximal aerobic power test signiicantly increaseed (P=0.04), but VO₂max did not change. τ of HR and of VO2 recovery signiicantly decreased by 17.3% (P=0.04) and 22.0% (P