Table S1: Placement of reflective markers; Table S2: Analysis of swing variation from Biomechanical demands of percussive techniques in the context of early stone toolmaking

Table S1: Details of marker placement used for the computation of inverse kinematics; Table S2: Analysis of swing variation with the computation of magnitude (noted M, corresponding to the amplitude difference expressed in percentage) and phase (noted P, corresponding to the temporal shift expressed in percentage) between swings for kinematics and EMG, using the formulas of Sprague and Geers [62]. In order to assess the degree of repeatability, swing variation significance was tested using two (kinematic and electromyography) three-way (M/P*technique* muscle/angle) independent measure ANOVA. PH vs BP $; PH vs FH ¤