We introduce a simple model of human’s musculoskeletalsystem to identify the computation that a compliantphysical body can achieve. A one-joint system driven by actuationof the springs around the joint is used as a computationaldevice to compute the temporal integration and nonlinearcombination of an input signal. Only a linear and static readoutunit is needed to extract the output of the computation. Theresults of computer simulations indicate that the network ofmechanically coupled springs can emulate several nonlinearcombinations which need temporal integration. The simulationwith a two-joint system also shows that, thanks to mechanicalconnection between the joints, a distant part of a compliantbody can serve as a computational device driven by the indirectinput. Finally, computational capability of antagonistic musclesand information transfer through mechanical couplings arediscussed.