Measurements of muscle torque were performed
according to the generally accepted principles [10].
During the measurement of muscle torque of elbow
flexors and extensors the subject was sitting, with his
arm bent at a proper angle and placed on the armrest,
and with his trunk stabilized (Fig. 1). The muscle
torques of shoulder flexors and extensors were measured
also in a sitting position. The flexion angle was
set at 70° and the extension angle at 50° during the
measurement. The trunk was stabilized so that the
potential presence of synergic movements could be