Fig. 2.
Representative force (A) and kinematics (B) data (subject 3, task 1, trial 2). Seven time points [grip force onset (TGFstart), load force onset (TLFstart), maximum grip force (TGFmax), maximum load force (TLFmax), movement start time (TACCstart), peak velocity time (TVpeak), movement termination time (TACCend)] were determined from the temporal trajectories of the marker placed on the instrumented object and force profiles, and four movement phases (phases 1–4) were consequently defined by these time points.