Silva Robson Conceição, Sousa Leandro Lima, Correa Hugo de Luca, Silva Thailson Fernandes, Martins Lucas de Souza, Felix Pedro, Bottaro Martim, Vieira Denis César Leite, Ernesto Carlos
Graduate Program of Physical Education, Catholic University of Brasilia, Taguatinga-DF, Brasilia 71966-700, Brazil.
College of Physical Education, University of Brasilia-UnB, Asa Norte-DF, Brasília 700910-900, Brazil.
Sports (Basel). 2025 Jul 24;13(8):243. doi: 10.3390/sports13080243.
Low-load conditioning activity with blood flow restriction has been addressed as an efficient method to enhance an individual's performance during their main exercise activity. However, the optimal degree of blood flow restriction remains unclear. Therefore, this study investigated the acute effects of low-load conditioning activity with different degrees of blood flow restriction on muscle strength, power, and perceived exertion. Twenty recreationally trained men (20.9 ± 2.3 years) participated in a randomized crossover design including three conditions: control, low-load blood flow restriction at 50%, and 75% of total arterial occlusion pressure. Participants performed squats (three sets of ten reps) followed by isokinetic assessments of the knee flexor and extensor performance at 7 and 10-min post-exercise. The session rating of perceived exertion (SRPE) was recorded 30 min after each session. No significant effects were observed for condition, time, or their interaction on peak torque, total work, or average power ( < 0.05). However, SRPE was significantly higher in the 75% BFR condition compared to both the 50% BFR and control conditions ( < 0.05), with no difference between the 50% BFR and control. These findings suggest that low-load conditioning activity with blood flow restriction does not acutely enhance neuromuscular performance. However, a higher degree of restriction increases perceived exertion.
低负荷限制血流调节活动已被视为一种在主要运动活动中提高个体表现的有效方法。然而，血流限制的最佳程度仍不清楚。因此，本研究调查了不同程度血流限制的低负荷调节活动对肌肉力量、功率和主观用力感觉的急性影响。20名接受过休闲训练的男性（20.9±2.3岁）参与了一项随机交叉设计，包括三种情况：对照组、总动脉闭塞压力50%的低负荷血流限制组和75%的低负荷血流限制组。参与者进行深蹲（三组，每组10次重复），然后在运动后7分钟和10分钟对膝关节屈伸性能进行等速评估。每次训练后30分钟记录主观用力感觉量表（SRPE）。在峰值扭矩、总功或平均功率方面，未观察到情况、时间或它们的交互作用有显著影响（P<0.05）。然而，与50%血流限制组和对照组相比，75%血流限制组的SRPE显著更高（P<0.05），50%血流限制组和对照组之间无差异。这些发现表明，低负荷限制血流调节活动不会急性增强神经肌肉性能。然而，更高程度的限制会增加主观用力感觉。
