Effect of Wheelchair Stroke Pattern on Upper Extremity Muscle Fatigue

Overview

Journal PM R

Publisher Wiley

Specialties Emergency Medicine
Rehabilitation Medicine

Date 2018 Apr 9

PMID 29627608

Authors

Brittany Bickelhaupt

Sakiko Oyama

Jonathan Benfield

Keith Burau

Shuko Lee

Michelle Trbovich

Affiliations

Soon will be listed here.

Abstract

Background: Shoulder dysfunction is common in persons with spinal cord injury (SCI) with an incidence of up to 63%. Dysfunction is a result of muscle imbalances, specifically denervated rotator cuff muscles that are repetitively used during manual wheelchair propulsion.

Objective: To determine which arm stroke technique, pump (P) or semicircular (SC), is most energy efficient for long periods of propulsion.

Design: A randomized study with repeated measures observations.

Setting: The study was performed at an institutional gait analysis laboratory.

Participants: 18 able-bodied (AB) male participants were studied and randomized into one of 2 conditions, SC or P.

Methods: Shoulder muscle fatigue was measured by changes in Borg CR10 Rate of Perceived Exertion (Borg RPE) and upper extremity strength via a handheld dynamometer. Participants were studied and assigned into one of 2 conditions of wheelchair arm propulsion patterns, SC or P group, and propelled on a wheelchair treadmill for 10 minutes.

Main Outcome Measures: The primary outcomes included recordings of Borg RPE scale during continuous wheelchair propulsion and pre- and post-test dynamometer testing means for bilateral elbow and shoulder extension. Analysis of covariance, t-tests, and Kruskal-Wallis tests were used in analyzing data.

Results: Although not significant (P = .23), the Borg RPE scores for the SC condition were consistently higher than the scores for the P condition. In addition, the dynamometer pre- and post-test readings demonstrated a larger decrease for the SC condition participants than for the P condition participants, but were not statistically significant.

Conclusions: These data demonstrate that the SC wheelchair propulsion pattern appears to be more fatiguing to shoulder muscles than the P propulsion pattern. However, more data would need to be collected to find a significant difference.

Level Of Evidence: II.

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