1. Shoulder Biomechanics During the Push Phase of Wheelchair Propulsion: A Multisite Study of Persons With Paraplegia 
Jennifer L. Collinger, BS, Michael L. Boninger, MD, Alicia M. Koontz, PhD, RET, Robert Price, MSME, Sue Ann Sisto, PT, MA, PhD, Michelle L. Tolerico, MS, Rory A. Cooper, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 89, Issue 4, Pages (April 2008)
DOI: /j.apmr
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig 1 Trunk local coordinate system. Reprinted with permission.11
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig 2
Group mean shoulder forces—(A) Fx, anterior and posterior force; (B) Fy, superior and inferior force; (C) Fz, medial and lateral force; and (D) resultant force—during 3 speeds of propulsion. The transition from push phase to recovery is shaded because it differs slightly between speed conditions.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4. Fig 3
Group mean shoulder moments during 3 speeds of propulsion. (A) Mx, abduction and adduction moment, (B) My, external and internal rotation moment, and (C) Mz, flexion and extension moment. The transition from push phase to recovery is shaded because it differs slightly between speed conditions.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

5. Fig 4
Group mean shoulder Euler angles—(A) plane of elevation, (B) elevation, and (C) rotation—during 3 speeds of propulsion. The transition from push phase to recovery is shaded because it differs slightly between speed conditions.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions