Delayed-onset muscle soreness induced by low-load blood flow-restricted exercise
Delayed-onset muscle soreness induced by low-load blood flow-restricted exercise
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DOI：
10.1007/s00421-009-1175-6
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发表时间：
2009-12-01
影响因子：
3
通讯作者：
Clark, Brian C.
中科院分区：
文献类型：
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作者：
Umbel, Jonathan D.;Hoffman, Richard L.;Clark, Brian C.
我们进行了两个实验来描述与血流限制（BFR）运动相关的延迟性肌肉酸痛（DOMS）的幅度，并确定BFR运动对DOMS的同心（CON）与偏心（ECC）作用的贡献。在实验1中，9名受试者进行了三组单侧膝关节伸展BFR运动在35%的最大自主收缩（MVC）失败与大腿袖充气30%以上的肱动脉收缩压。受试者在无血流限制的情况下使用对侧肢体重复方案。在运动前和运动后24、48和96 h评估静息疼痛（0-10级）和痛觉测定法（痛压阈值; PPT）。此外，MVC和股外侧肌横截面积（CSA）作为运动性肌肉损伤的指标进行了测量。运动后24小时，BFR运动导致更多的疼痛比运动没有BFR（2.8 +/- A 0.3 vs 1.7 +/- A 0.5）和PPT降低幅度更大（15.2 +/- A 1.7 vs. 20 +/- A 2.3 N）和MVC（14.1 +/- A 2.5%降低vs. 1.5 +/- A 4.5%降低）（p <0.05）。在实验2中，15名不同的受试者进行了三组单侧BFR运动在35%MVC的一个肢体只执行CON行动和对侧执行ECC行动。分别于运动前及运动后24、48、96 h测定上述DOMS指标。在运动后24小时，CON BFR运动比ECC BFR运动导致更多的静息疼痛（3.0 +/- A 0.5 vs. 1.6 +/- A 0.4），MVC下降幅度更大（9.8 +/- A 2.7%下降vs. 3.4 +/- A 2.5%下降）（p <0.05）。这些数据表明，膝关节伸展BFR运动诱导轻度DOMS和BFR运动eliminates肌肉损伤的非典型条件下，低张力同心收缩。
We performed two experiments to describe the magnitude of delayed-onset muscle soreness (DOMS) associated with blood flow restriction (BFR) exercise and to determine the contribution of the concentric (CON) versus eccentric (ECC) actions of BFR exercise on DOMS. In experiment 1, nine subjects performed three sets of unilateral knee extension BFR exercise at 35% of maximal voluntary contraction (MVC) to failure with a thigh cuff inflated 30% above brachial systolic pressure. Subjects repeated the protocol with the contralateral limb without flow restriction. Resting soreness (0-10 scale) and algometry (pain-pressure threshold; PPT) were assessed before and 24, 48 and 96 h post-exercise. Additionally, MVC and vastus lateralis cross-sectional area (CSA) were measured as indices of exercise-induced muscle damage. At 24-h post-exercise, BFR exercise resulted in more soreness than exercise without BFR (2.8 +/- A 0.3 vs 1.7 +/- A 0.5) and greater reductions in PPT (15.2 +/- A 1.7 vs. 20 +/- A 2.3 N) and MVC (14.1 +/- A 2.5% decrease vs. 1.5 +/- A 4.5% decrease) (p a parts per thousand currency sign 0.05). In experiment 2, 15 different subjects performed three sets of unilateral BFR exercise at 35% MVC with one limb performing only the CON action and the contralateral performing the ECC action. The aforementioned indices of DOMS were assessed before exercise and 24, 48 and 96 h post-exercise. At 24 h post-exercise, CON BFR exercise resulted in more resting soreness than ECC BFR exercise (3.0 +/- A 0.5 vs. 1.6 +/- A 0.4), and a greater decrease in MVC (9.8 +/- A 2.7% decrease vs. 3.4 +/- A 2.5% decrease) (p a parts per thousand currency sign 0.05). These data suggest that knee extension BFR exercise induces mild DOMS and that BFR exercise elicits muscle damage under atypical conditions with low-tension concentric contractions.