Buchem, F. van

force support backrest shoulder space biomechanical model muscle situation mass centre space erasmus university shoulder pelvis model activity figure support force university biomechanical scapulae centre scapular support angle erasmu muscle activity gravity andersson subject goossen backrest inclination study downloaded increase ischial tuberosities scapular march 1=0 situation ii 2=0 distance snijder level posture measurement chair surface result design seat angle position technology shoulder space requirements scapular support force spine journal equilibrium delft analysis muscle force emg activity decrease ortengren inclination erector spinae hypotheses tuberositie pressure ischial figure 1 scandinavian journal erasmus university rotterdam twente technology transfer delft university erector spinae muscle disc pressure situation iii netherland =6 cm spinae body weight height