Pamukoff Derek N, Pietrosimone Brian, Lewek Michael D, Ryan Eric D, Weinhold Paul S, Lee Dustin R, Blackburn J Troy
Department of Kinesiology, California State University, Fullerton, Fullerton, CA; Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC; Curriculum in Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC; Curriculum in Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
Arch Phys Med Rehabil. 2016 Jul;97(7):1121-9. doi: 10.1016/j.apmr.2016.01.021. Epub 2016 Feb 8.
To determine the immediate effects of a single session of whole-body vibration (WBV) and local muscle vibration (LMV) on quadriceps function in individuals with anterior cruciate ligament reconstruction (ACLR).
Singe-blind, randomized crossover trial.
Research laboratory.
Population-based sample of individuals with ACLR (N=20; mean age ± SD, 21.1±1.2y; mean mass ± SD, 68.3±14.9kg; mean time ± SD since ACLR, 50.7±21.3mo; 14 women; 16 patellar tendon autografts, 3 hamstring autografts, 1 allograft).
Participants performed isometric squats while being exposed to WBV, LMV, or no vibration (control). Interventions were delivered in a randomized order during separate visits separated by 1 week.
Quadriceps active motor threshold (AMT), motor-evoked potential (MEP) amplitude, Hoffmann reflex (H-reflex) amplitude, peak torque (PT), rate of torque development (RTD), electromyographic amplitude, and central activation ratio (CAR) were assessed before and immediately after a WBV, LMV, or control intervention.
There was an increase in CAR (+4.9%, P=.001) and electromyographic amplitude (+16.2%, P=.002), and a reduction in AMT (-3.1%, P<.001) after WBV, and an increase in CAR (+2.7%, P=.001) and a reduction in AMT (-2.9%, P<.001) after LMV. No effect was observed after WBV or LMV in H-reflex, RTD, or MEP amplitude. AMT (-3.7%, P<.001), CAR (+5.7%, P=.005), PT (+.31Nm/kg, P=.004), and electromyographic amplitude (P=.002) in the WBV condition differed from the control condition postapplication. AMT (-3.0% P=.002), CAR (+3.6%, P=.005), and PT (+.30Nm/kg, P=.002) in the LMV condition differed from the control condition postapplication. No differences were observed between WBV and LMV postapplication in any measurement.
WBV and LMV acutely improved quadriceps function and could be useful modalities for restoring quadriceps strength in individuals with knee pathologies.
确定单次全身振动（WBV）和局部肌肉振动（LMV）对前交叉韧带重建（ACLR）患者股四头肌功能的即时影响。
单盲、随机交叉试验。
研究实验室。
基于人群的ACLR患者样本（N = 20；平均年龄±标准差，21.1±1.2岁；平均体重±标准差，68.3±14.9kg；自ACLR后的平均时间±标准差，50.7±21.3个月；14名女性；16例髌腱自体移植，3例腘绳肌自体移植，1例同种异体移植）。
参与者在接受WBV、LMV或无振动（对照）时进行等长蹲。干预措施在间隔1周的单独访视中以随机顺序进行。
在WBV、LMV或对照干预前及干预后立即评估股四头肌主动运动阈值（AMT）、运动诱发电位（MEP）幅度、霍夫曼反射（H反射）幅度、峰值扭矩（PT）、扭矩发展速率（RTD）、肌电图幅度和中枢激活率（CAR）。
WBV后CAR增加（+4.9%，P = .001）和肌电图幅度增加（+16.2%，P = .002），AMT降低（-3.1%，P < .001）；LMV后CAR增加（+2.7%，P = .001）和AMT降低（-2.9%，P < .001）。WBV或LMV后H反射、RTD或MEP幅度未观察到影响。WBV条件下应用后AMT（-3.7%，P < .001）、CAR（+5.7%，P = .005）、PT（+.31 Nm/kg，P = .004）和肌电图幅度（P = .002）与对照条件不同。LMV条件下应用后AMT（-3.0%，P = .002）、CAR（+3.6%，P = .005）和PT（+.30 Nm/kg，P = .002）与对照条件不同。应用后WBV和LMV在任何测量中均未观察到差异。
WBV和LMV可急性改善股四头肌功能，可能是恢复膝关节病变患者股四头肌力量的有用方式。
