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Whole-Body Vibration Improves Early Rate of Torque Development in Individuals With Anterior Cruciate Ligament Reconstruction

Pamukoff, Derek N.1,2,3; Pietrosimone, Brian2,3; Ryan, Eric D.2,3; Lee, Dustin R.2; Brown, Lee E.1; Blackburn, J. Troy2,3,4

Journal of Strength and Conditioning Research: November 2017 - Volume 31 - Issue 11 - p 2992–3000
doi: 10.1519/JSC.0000000000001740
Original Research
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Pamukoff, DN, Pietrosimone, B, Ryan, ED, Lee, DR, Brown, LE, and Blackburn, JT. Whole body vibration improves early rate of torque development in individuals with anterior cruciate ligament reconstruction. J Strength Cond Res 31(11): 2992–3000, 2017—The purpose of this study was to compare the effect of whole-body vibration (WBV) and local muscle vibration (LMV) on early and late quadriceps rate of torque development (RTD), and electromechanical delay (EMD) in individuals with anterior cruciate ligament reconstruction (ACLR). Twenty individuals with ACLR were recruited for this study. Participants performed isometric squats while being exposed to WBV, LMV, or no vibration (control) in a randomized order during separate visits. Early and late quadriceps RTD and EMD were assessed during a maximal voluntary isometric knee extension before and immediately after WBV, LMV, or control. There was a significant condition by time interaction for early RTD (p = 0.045) but not for late RTD (p = 0.11) or EMD of the vastus medialis (p = 0.15), vastus lateralis (p = 0.17), or rectus femoris (p = 0.39). Post hoc analyses indicated a significant increase in early RTD after WBV (+5.59 N·m·s−1·kg−1; 95% confidence interval, 1.47–12.72; p = 0.007). No differences were observed in the LMV or control conditions, and no difference was observed between conditions at posttest. The ability to rapidly produce knee extension torque is essential to physical function, and WBV may be appropriate to aid in the restoration of RTD after ACLR.

1Department of Kinesiology, California State University Fullerton, Fullerton, California;

2Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;

3The Department of Allied Health Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and

4Department of Orthopedics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina

Address correspondence to Dr. Derek N. Pamukoff, dpamukoff@fullerton.edu.

Copyright © 2017 by the National Strength & Conditioning Association.