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The peak jerk criteria (PJc). (a) a sample plot from the SC group comparing Pmax(0%–30%) values between two individuals, with and without shoulder pain. (b) a sample plot from the DLOP group comparing Pmax(0%–30%) values between two individuals, with and without shoulder pain. The scheme used for computing Pmax and PJc is shown below the figures. Cm : the propulsion cycle located closest to the mid of the trial (i.e. 90 seconds from the start of trial).
