Whole-Body and Local Muscle Vibration Immediately Improve Quadriceps Function in Individuals With Anterior Cruciate Ligament Reconstruction

Derek N Pamukoff; Brian Pietrosimone; Michael D Lewek; Eric D Ryan; Paul S Weinhold; Dustin R Lee; J Troy Blackburn

doi:10.1016/j.apmr.2016.01.021

Whole-Body and Local Muscle Vibration Immediately Improve Quadriceps Function in Individuals With Anterior Cruciate Ligament Reconstruction

Arch Phys Med Rehabil. 2016 Jul;97(7):1121-9. doi: 10.1016/j.apmr.2016.01.021. Epub 2016 Feb 8.

Authors

Derek N Pamukoff¹, Brian Pietrosimone², Michael D Lewek³, Eric D Ryan², Paul S Weinhold⁴, Dustin R Lee⁵, J Troy Blackburn⁶

Affiliations

¹ 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. Electronic address: dpamukoff@fullerton.edu.
² 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.
³ 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; Division of Physical Therapy, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
⁴ Curriculum in Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC; Department of Orthopedics, The University of North Carolina at Chapel Hill, Chapel Hill, NC; Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill and Raleigh, NC.
⁵ Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
⁶ 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 Orthopedics, The University of North Carolina at Chapel Hill, Chapel Hill, NC.

PMID: 26869286
DOI: 10.1016/j.apmr.2016.01.021

Abstract

Objective: 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).

Design: Singe-blind, randomized crossover trial.

Setting: Research laboratory.

Participants: 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).

Interventions: 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.

Main outcome measures: 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.

Results: 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.

Conclusions: WBV and LMV acutely improved quadriceps function and could be useful modalities for restoring quadriceps strength in individuals with knee pathologies.

Keywords: Knee; Muscles; Osteoarthritis; Rehabilitation; Resistance training.

Publication types

Randomized Controlled Trial
Research Support, Non-U.S. Gov't

MeSH terms

Anterior Cruciate Ligament Reconstruction / rehabilitation*
Cross-Over Studies
Evoked Potentials, Motor
Female
Humans
Isometric Contraction / physiology
Knee Joint / physiopathology*
Male
Muscle Strength / physiology
Physical Therapy Modalities*
Quadriceps Muscle / physiopathology*
Single-Blind Method
Torque
Vibration / therapeutic use*
Young Adult