TY - JOUR
T1 - A new method to quantify demand on the upper extremity during manual wheelchair propulsion
AU - Sabick, Michelle B.
AU - Kotajarvi, Brian R.
AU - An, Kai Nan
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/7
Y1 - 2004/7
N2 - Sabick MB, Kotajarvi BR, An K-N. A new method to quantify demand on the upper extremity during manual wheelchair propulsion. Arch Phys Med Rehabil 2004;85:1151-9. Objective To use an ergonomics-based rating that characterizes both demand on, and capacity of, upper-extremity muscle groups during wheelchair propulsion to help identify the muscle groups most at risk for pain or overuse injury in a relatively demanding wheelchair propulsion task. Design Case series. Setting Biomechanics research laboratory. Participants Sixteen manual wheelchair users with complete (American Spinal Injury Association grade A) T6-L2 paraplegia. Interventions Not applicable. Main outcome measures Internal peak joint moments required by each of the major upper-extremity muscle groups for propelling a wheelchair up a ramp; isometric strength of each of the muscle groups in positions simulating wheelchair propulsion; and wheelchair propulsion strength rating (WPSR) for each muscle group, calculated by normalizing the joint demands to their capacity. Results The largest joint moment was for shoulder flexion, at 39.7±13.9Nm. Shoulder flexion also accounted for the peak WPSR value of 66.5%±20.3%. Supination and pronation movements had low peak moment requirements (3.4Nm, 5.0Nm, respectively) but high WPSR values (41%, 53%, respectively). Conclusions Even a relatively benign ramp (2.9°) places a large demand on the musculature of the upper extremity, as assessed by using the WPSR to indicate muscular demand.
AB - Sabick MB, Kotajarvi BR, An K-N. A new method to quantify demand on the upper extremity during manual wheelchair propulsion. Arch Phys Med Rehabil 2004;85:1151-9. Objective To use an ergonomics-based rating that characterizes both demand on, and capacity of, upper-extremity muscle groups during wheelchair propulsion to help identify the muscle groups most at risk for pain or overuse injury in a relatively demanding wheelchair propulsion task. Design Case series. Setting Biomechanics research laboratory. Participants Sixteen manual wheelchair users with complete (American Spinal Injury Association grade A) T6-L2 paraplegia. Interventions Not applicable. Main outcome measures Internal peak joint moments required by each of the major upper-extremity muscle groups for propelling a wheelchair up a ramp; isometric strength of each of the muscle groups in positions simulating wheelchair propulsion; and wheelchair propulsion strength rating (WPSR) for each muscle group, calculated by normalizing the joint demands to their capacity. Results The largest joint moment was for shoulder flexion, at 39.7±13.9Nm. Shoulder flexion also accounted for the peak WPSR value of 66.5%±20.3%. Supination and pronation movements had low peak moment requirements (3.4Nm, 5.0Nm, respectively) but high WPSR values (41%, 53%, respectively). Conclusions Even a relatively benign ramp (2.9°) places a large demand on the musculature of the upper extremity, as assessed by using the WPSR to indicate muscular demand.
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U2 - 10.1016/j.apmr.2003.10.024
DO - 10.1016/j.apmr.2003.10.024
M3 - Article
C2 - 15241767
AN - SCOPUS:3242670865
VL - 85
SP - 1151
EP - 1159
JO - Archives of Physical Medicine and Rehabilitation
JF - Archives of Physical Medicine and Rehabilitation
SN - 0003-9993
IS - 7
ER -