PM R, 2018 · DOI: 10.1016/j.pmrj.2018.03.022 · Published: October 1, 2018
This study investigates the impact of different wheelchair propulsion techniques (pump vs. semicircular) on shoulder muscle fatigue in able-bodied individuals. It seeks to determine which technique is more energy-efficient for prolonged use, as shoulder pain is a common issue for manual wheelchair users. The researchers measured muscle fatigue through perceived exertion (Borg RPE scale) and upper extremity strength (dynamometer readings) after participants used each technique for 10 minutes on a wheelchair treadmill. The study aims to inform recommendations for wheelchair users to prevent shoulder injuries. While the study did not find statistically significant differences between the two techniques, the semicircular pattern appeared to be more fatiguing based on higher perceived exertion and greater strength decreases. The findings suggest that propulsion technique may impact shoulder muscle fatigue.
The findings suggest that the pump propulsion technique may be less fatiguing for the shoulder muscles compared to the semicircular technique.
The correlation between distal upper extremity length and shoulder fatigue in the semicircular technique suggests that individual patient stature should be considered when recommending propulsion techniques.
The study highlights the need for further research with larger sample sizes and spinal cord injury participants to confirm these findings and explore the underlying mechanisms.