A Comparison of Knee-Extension Torque Production with Biphasic versus Russian Current

in Journal of Sport Rehabilitation
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Context:

Neuromuscular electrical stimulation (NMES) can be used to prevent the atrophy and strength loss associated with immobilization.

Objective:

To compare the effects of biphasic current and the modulated “Russian” current on muscular torque production during different contraction conditions.

Design, Setting, and Participants:

In a within-subjects design, 10 healthy subjects in an athletic training laboratory received NMES.

Interventions:

Isometric knee-extension torque was recorded with the Biodex™ under 4 conditions: maximum voluntary contraction (MVC; control), MVC superimposed with low-intensity stimulation (sham), MVC superimposed with high-intensity stimulation, and high-intensity stimulation only.

Main Outcome Measure:

Data normalized for body weight were analyzed using a 2 (current type) X 4 (condition) repeated-measures analysis of variance.

Results:

The main effect for current type was not significant, F1,9 = .03, P = .87.

William R. Holcomb and Shante Hill are with the College of Health at the University of North Florida, Jacksonville, FL 32224-2645. Shahin Golestani was with Creighton University at the time of the study.