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Aim

Pushrim biomechanical changes with progressive increases in slope during motorized treadmill manual wheelchair propulsion in individuals with spinal cord injury. Dany H. Gagnon, PT, PhD; Annie-Claude Babineau; Audrey Champagne; Guillaume Desroches, PhD; Rachid Aissaoui, Eng PhD. Aim

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Aim

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  1. Pushrim biomechanical changes with progressive increases in slope during motorized treadmill manual wheelchair propulsion in individuals with spinal cord injury Dany H. Gagnon, PT, PhD; Annie-Claude Babineau; Audrey Champagne; Guillaume Desroches, PhD; Rachid Aissaoui, Eng PhD

  2. Aim • Quantify effects of 5 distinct slopes on spatiotemporal and pushrim kinetic measures at nondominant upper limb during manual wheelchair (MWC) propulsion on motorized treadmill in individuals with spinal cord injury (SCI). • Relevance • Most people with SCI will not regain sensorimotor capabilities needed to walk independently or efficiently and must learn to use an MWC.

  3. Method • 18 participants with SCI propelled MWC at self-selected natural speed on treadmill at different slopes (0, 2.7, 3.6, 4.8, and 7.1). • Spatiotemporal parameters, total force, and tangential components of force applied to pushrim (including mechanical effective force) were calculated using instrumented wheel.

  4. Results • Duration of recovery phase: • 54% to ­70% faster as slope increased. • Duration of push phase remained similar. • Initial and total contact angles: • Migrated forward on pushrim. • Final contact angle: • Similar and higher for slopes greater than 0. • Mean total force as slope increased: • 93% to 201% higher. • Mean tangential component of force: • 96% to 176% higher than no-slope propulsion. • 2.7 and 3.6 had similar measures.

  5. Conclusion • Overall, recovery phase became shorter and forces applied at pushrim became greater as slope of treadmill increased during motorized treadmill MWC propulsion.

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