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The group (YA and OA), object type (H and L), and trial averaged time courses for each of the recorded kinetic variables and EMG signals of four muscles in both arms. While on average differences between YAs and OAs are apparent, from these time series one a) cannot quantify to what extent these differences are consistent across individuals; and b) what combinations of muscles and/or forces are consistently different (or similar) between OAs and YAs.
