Do different time intervals after ischemic preconditioning affect acute neuromuscular performance of basketball athletes?
摘要
The purpose of this study was to analyze the effect of different time intervals after an ischemic preconditioning (IPC) session on the neuromuscular performance of basketball athletes. Twenty-four male basketball athletes (age: 18.2 ± 0.4 years; body mass: 75.2 ± 3.5 kg; height: 1.79 ± 0.02 m; body mass index: 23.3 ± 0.9 kg/m2) participated in the study. Each athlete completed four experimental conditions: 15-min rest (15R), 30-min rest (30R), 45-min rest (45R), and a sham condition (SC), with a wash-out period of 48–72 h between sessions. In the IPC conditions, athletes underwent four cycles of 5 min of occlusion at arterial occlusion pressure (AOP), interspersed with 5 min of reperfusion, followed by Smith machine squats at 50% of one-repetition maximum (1RM) until a 10% velocity loss. In the sham condition, athletes rested for 40 min under 20 mmHg pressure before performing the same squat protocol. Mean propulsive velocity (MPV), volume load, and ratings of perceived exertion (RPE) were measured. Results showed no significant differences in MPV across conditions (P > 0.05). However, volume load was significantly higher in all IPC conditions compared to the sham (P < 0.001). In conclusion, a single IPC session prior to resistance exercise did not enhance MPV after time intervals of 15, 30, or 45 min in basketball athletes. Nonetheless, IPC increased total training volume, suggesting that it may be a useful strategy to augment training load, although its effect on velocity performance appears limited.