1. A new method to quantify demand on the upper extremity during manual wheelchair propulsion1 
Michelle B. Sabick, PhD, Brian R. Kotajarvi, PT, Kai-Nan An, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 85, Issue 7, Pages (July 2004)
DOI: /j.apmr

2. Fig 1
View of the instrumented handrim that was applied to the subject’s wheelchair. The handrim assembly was coupled to the wheel through a 6-component load cell to record the forces and moments applied to the handrim. A portable data logger was mounted to the wheel to record data from the load cell and to transfer it to a personal computer after each trial.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

3. Fig 2
A subject propelling his wheelchair up the ramp. Reflective markers are mounted on the subject’s trunk and left upper extremity.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

4. Fig 3
Locations of the 13 reflective markers applied to the upper extremity and the orientations of the trunk, upper arm, forearm, and hand coordinate systems. Reprinted with permission.49
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

5. Fig 4
Views of a subject performing isometric strength testing of shoulder (A) abduction and adduction and (B) internal and external rotation by using the Cybex II isokinetic dynamometer. The arm and trunk are secured by using Velcro bands.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

6. Fig 5
Two views of a subject performing (A) elbow flexion and extension and (B) wrist flexion and extension joint strength tests by using the custom torque cell dynamometers developed and validated in our laboratory.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

7. Fig 6
Comparison of mean WPSR and Mmax values. In some cases, relatively low Mmax values correspond to relatively large WPSR values, because of the limited capacity of the specific muscle group to generate torque. Abbreviations: Dev, deviation; Ext, external; Int, internal; Rad, Radial; Rot, rotation.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )