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Coordination patterns of shoulder muscles during level-ground and incline wheelchair propulsion

Investigating how shoulder muscle coordination changes during wheelchair propulsion on different terrains. Results show increased muscle activity on incline surfaces, impacting performance. This study aims to optimize wheelchair users' performance with muscle assessment tools.

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Coordination patterns of shoulder muscles during level-ground and incline wheelchair propulsion

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  1. Coordination patterns of shoulder muscles during level-ground and incline wheelchair propulsion Liping Qi, PhD; James Wakeling, PhD; Simon Grange, PhD; Martin Ferguson-Pell, PhD

  2. Aim • Investigate how coordination patterns of shoulder muscles change in level-ground and incline wheelchair propulsion. • Relevance • People with spinal cord injury usually rely on manual wheelchair propulsion for independent mobility. • Wheelchair users adopt different postures and stroke techniques to suit different locomotion tasks. • Muscle assessment instruments could help clinicians optimize wheelchair users’ performance.

  3. Method • 15 nondisabled subjects. • Recorded wheelchair kinetics and electromyography (EMG) activity of seven muscles during wheelchair propulsion on stationary ergometer and wooden ramp. • Measured wheelchair kinetic data with SmartWheel.

  4. Results • Push forces on push rim and percentage of push phase in cycle: • Increased significantly during incline propulsion. • Propulsion condition and posture: • Affected muscle coordination patterns. • During incline propulsion: • More intense and longer EMG activity of push muscles in push phase. • Less EMG activity of the recovery muscles. • Corresponded with increased kinetic data total force output and longer push phase in incline condition.

  5. Conclusion • This work establishes framework for developing performance feedback system for wheelchair users to better coordinate their muscle patterning activity.

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