Indices of exercise induced muscle damage following low load resistance exercise with blood flow restriction in untrained males.

IF 1.2 4区 医学 Q3 SPORT SCIENCES
Christopher E Proppe, Paola M Rivera, Ryan T Kelly, Nathaniel P Rotenberger, Santiago Salazar, Sean M Lubiak, Ethan C Hill
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引用次数: 0

Abstract

Background: There is conflicting evidence regarding the presence and magnitude of exercise-induced muscle damage (EIMD) following low-load resistance training with blood flow restriction (LL+BFR), which may be related to the protocol implemented or exercise volume. Therefore, the purpose of this investigation was to examine the effects of a 75 repetition (BFR-75) (1×30, 3×15) and four sets to volitional failure (BFR-4x) protocols on indices of EIMD among untrained men.

Methods: Twelve males with no history of lower-body resistance training during the previous six months volunteered for this investigation. One leg was randomly assigned to BFR-75, and the other to BFR-4x. Participants performed isokinetic, unilateral, concentric-eccentric, leg extension muscle actions at 30% of maximal strength with BFR. Indices of EIMD (limb circumference, perceived muscle soreness, pain pressure threshold [PPT], passive range of motion, and maximal strength [MVIC]) were recorded before exercise and 0, 24, 48, 72, and 96-hours post-exercise for each protocol.

Results: There were no significant changes (P>0.05) in limb circumference, PPT, passive range of motion, or MVIC. For both BFR-75 and BFR-4x, perceived muscle soreness increased (P<0.001) similarly 24- (2.5±1.7 AU) and 48-hours (1.9±1.7 AU) post-exercise.

Conclusions: There was an increase in muscle soreness 24-48 hours post-exercise for both conditions, which may be due to metabolic stress, but this did not affect the force-generating capacity of the muscle (MVIC), suggesting minimal EIMD. The conflicting evidence of EIMD following LL+BFR may be related to differences in restriction time or overall exercise time.

未经训练的男性进行低负荷阻力运动并限制血流后,运动诱发肌肉损伤的指标。
背景:关于血流受限低负荷阻力训练(LL+BFR)后运动诱发肌肉损伤(EIMD)的存在和程度,有相互矛盾的证据,这可能与实施的方案或运动量有关。因此,本研究旨在考察 75 次(BFR-75)(1×30、3×15)和四组至意志衰竭(BFR-4x)方案对未受训男性 EIMD 指数的影响:方法:12 名在过去 6 个月中没有进行过下半身阻力训练的男性自愿参加此次调查。一条腿被随机分配给 BFR-75,另一条腿被随机分配给 BFR-4x。参与者使用 BFR 以最大力量的 30% 进行等动、单侧、同心-同心、腿部伸展肌肉动作。在运动前和运动后 0、24、48、72 和 96 小时,记录每个方案的 EIMD 指标(肢体围度、肌肉酸痛感、疼痛压力阈值 [PPT]、被动运动范围和最大力量 [MVIC]):结果:肢体围度、PPT、被动运动范围或 MVIC 均无明显变化(P>0.05)。对于 BFR-75 和 BFR-4x,肌肉酸痛感都有所增加(PC 结论:肌肉酸痛感有所增加:两种情况下,运动后 24-48 小时肌肉酸痛都会增加,这可能是由于新陈代谢压力造成的,但这并不影响肌肉的发力能力(MVIC),表明 EIMD 的影响很小。LL+BFR 运动后出现 EIMD 的证据相互矛盾,这可能与限制时间或整体运动时间的差异有关。
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来源期刊
CiteScore
2.90
自引率
5.90%
发文量
393
审稿时长
6-12 weeks
期刊介绍: The Journal of Sports Medicine and Physical Fitness publishes scientific papers relating to the area of the applied physiology, preventive medicine, sports medicine and traumatology, sports psychology. Manuscripts may be submitted in the form of editorials, original articles, review articles, case reports, special articles, letters to the Editor and guidelines.
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