Contact pressure distribution at hand-handle interface: role of hand forces and handle size

The methodology proposed in this study and the results could be applied to estimate the peak hand-handle interface pressures for operators of hand-held tools, which have been associated with discomfort, pain and musculoskeletal disorders. The suggested methods provide objective means to assess the magnitudes and locations of high pressure peaks that may cause pressure-induced discomfort and pain, and thereby the stresses imposed on the hand. The distribution of pressure and the contact force in the hand-handle interface as a function of the handle size could lead to advancement of knowledge on the handle size issue. Furthermore, the results are expected to enhance our understanding of the biodynamic response of the human hand-arm, while operating power tools.