ABSTRACT
The purpose of this study was to examine the effect of active recovery between two strenuous anaerobic exercises separated by a short time interval. Eight healthy adult male volunteers (age: 24.8±1.8 yrs, height: 170.6±2.5 cm, weight : 70.1 ±2.5 kg) underwent five exercise sessions. Each session consisted of a warm-up, the first anaerobic exercise test (40 sec of exhaustive cycle ergometer exercise), a 30 min inactive (seated) or active recovery period, and a second anaerobic exercise test. During the active recovery period, subjects executed one of four different intensity pedaling tests (60, 80, 100, 120% of predetermined lactate threshold intensity) for 10 min. There were no significant differences in mean power and peak blood lactate concentration among sessions during the first anaerobic exercise test. Significant differences were found in the blood lactate concentration among sessions during the second anaerobic exercise test, and significant differences were found in mean power for the second anaerobic exercise. Optimal intensity related to the blood lactate removal rate was 83.3±7.1%LT, and that related to the working capacity recovery rate was 68.3±11.8%LT.<BR>From these results, concerning blood lactate removal rate, it was suggested that between 80%LT and 100%LT was an effective intensity. As for performance, the effective intensity was less than 100%LT.
ABSTRACT
The purpose of the present study was to elucidate the effective recovery mode during intervals in water-polo games from the viewpoint of blood lactate removal. Six male elite water-polo players (aged 20±2 years old) volunteered to participate as the subjects. Three different modes of recovery ; sitting (Rest), kicking of breast stroke on the spot (Kick), and backstroke swimming (Swim) were compared for breathing air or 60%O<SUB>2</SUB>. Blood lactate removal was expressed as the percentage decrease in blood lactate concentration from the end of preceding period to the end of the interval. The lactate removal in Swim was the highest (p<0.05) of the three kinds of recovery modes. Lactate removal indicated a higher value in order of Swim>Kick>Rest for breathing air. And it was facili tated in Swim (2.1%), Kick (5.4%) and Rest (8.1%) by 60%O<SUB>2</SUB> inhalation, although no significant differences were observed. From these results, it was suggested that the blood lactate removal during intervals in water-polo games would be facilitated by an active recovery mode like Swim, and that the inhalation of 60%O<SUB>2</SUB> would not bring any significant effects.