DIFFERENT COOLING STRATEGIES BETWEEN SETS FOR 30 SECONDS DOES NOT HAVE BENEFICIAL EFFECT ON RESISTANCE EXERCISE WITH BLOOD FLOW RESTRICTION

ABSTRACT The ice application (cooling) has become popular during physical activities to improve performance. This study aimed to test whether different cooling places could increase the number of repetitions (volume) during resistance training with blood flow restriction (BFR). Ten women volunteered for this study. The sample characterization is presented in mean and standard deviation: age: 28.5 ± 8.6 years; height: 164.6 ± 8.3 cm; total body mass: 61.5 ± 7.1 maximal dynamic strength test (1RM): 236.5 ± 54.8 kg; 30% 1RM: 71.6 ± 16.5; SBP: 124.7 ± 7.7 mm Hg; 1.3 x SBP: 161.8 ± 10.4 mm Hg. The subjects performed five sessions of resistance exercise with BFR. Three sets were held in each session, with the intensity of 30% of 1RM until muscle failure; and 30-second rest period between sets. The cooling sites were: hands, neck, and tunnel temperature. One session without cooling was done and considered as a control group. There was neither difference in the total number of repetitions of repetitions among interventions, nor a significant difference among interventions for RPE (P = 0.49). Therefore, we do not recommend cooling to maintain a high number of repetitions during strength training with BFR.

摘要：冰敷（降温）在体育运动中用于提升运动表现的做法已愈发普及。本研究旨在探究不同降温部位是否能提升血流限制训练（blood flow restriction, BFR）过程中的重复动作次数（训练容量）。本研究共招募10名女性志愿者参与。受试者的基线特征以均值±标准差的形式呈现：年龄28.5±8.6岁；身高164.6±8.3 cm；体质量61.5±7.1 kg；单次最大力量（1RM）测试值236.5±54.8 kg；30%1RM负荷71.6±16.5；收缩压（systolic blood pressure, SBP）124.7±7.7 mmHg；1.3倍收缩压值161.8±10.4 mmHg。受试者共完成5次血流限制阻力训练，每次训练包含3组，负荷为30%1RM，直至肌肉力竭，组间休息30秒。本次实验设置的降温部位为：手部、颈部与隧道式降温。另有1次无降温训练作为对照组。不同干预方式下的总重复动作次数无显著差异，自觉劳累程度分级（Rating of Perceived Exertion, RPE）在各组间也未呈现显著差异（P=0.49）。综上，本研究不建议在血流限制力量训练中通过降温来维持较高的重复动作次数。