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Figure 2. Angle θ is defined by direction of first principal component (PCI) and second principal component (PCII) loading score vector.
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Figure 2. Angle θ is defined by direction of first principal component (PCI) and second principal component (PCII) loading score vector. Qi L, Wakeling J, Grange S, Ferguson-Pell M. Effect of velocity on shoulder muscle recruitment patterns during wheelchair propulsion in nondisabled individuals: Pilot study. J Rehabil Res Dev. 2012;49(10):1527–36.http://dx.doi.org/10.1682/JRRD.2011.03.0047