Fig. 2

Synergy index of moment of force. There was no difference observed in synergy index between the hands in both task conditions. TOST analysis showed statistical equivalence (p < 0.001) of the synergy index of LH and RH (DH and NDH of the right handers). However, synergy index of moment of force in the fixed condition was higher than the free condition for both hands (F(1,19) = 81.08, η2 = 0.81, p < 0.0001).