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Muscle Nerve. 2016 Sep;54(3):469-78. doi: 10.1002/mus.25081.

Immediate effect of vibratory stimuli on quadriceps function in healthy adults.

Author information

1
Department of Kinesiology, California State University, Fullerton, 800 North State College Boulevard, Fullerton, California, 92831, USA.
2
Department of Exercise and Sport Science, California State University, Fullerton, Fullerton, California, USA.
3
Curriculum in Human Movement Science, California State University, Fullerton, Fullerton, California, USA.
4
Division of Physical Therapy, Department of Allied Health Sciences, University of North Carolina, Chapel Hill, North Carolina, USA.
5
Department of Orthopedics, California State University, Fullerton, Fullerton, California, USA.
6
Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Chapel Hill, North Carolina, USA.

Abstract

INTRODUCTION:

The purpose of this study was to compare the effect of whole body vibration (WBV) and local muscle vibration (LMV) on quadriceps function.

METHODS:

Sixty adults were randomized to WBV, LMV, or control groups. Quadriceps function [Hoffmann (H)-reflex, active motor threshold (AMT), motor evoked potential (MEP) and electromyographic amplitude, peak torque (PT), rate of torque development (RTD), and central activation ratio (CAR)] was assessed before and immediately after and 10 and 20 minutes after interventions.

RESULTS:

WBV improved PT, CAR, AMT, EMG, and MEP amplitude, and EMG amplitude and CAR were greater than control after application. LMV improved EMG amplitude and AMT, and EMG amplitude was greater than control after application. AMT remained lower 10 and 20 minutes after WBV and LMV. No differences were noted between LMV and WBV. Vibration did not influence H-reflex or RTD.

CONCLUSIONS:

WBV and LMV increased quadriceps function and may be used to enhance the efficacy of strengthening protocols. Muscle Nerve 54: 469-478, 2016.

KEYWORDS:

Hoffmann reflex; cortical; muscle; neuron; quadriceps; strength

PMID:
26872828
DOI:
10.1002/mus.25081
[Indexed for MEDLINE]

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