This invention can be embodied in smart clothing for recognizing full-body human motion based on the pressure levels of a flowable substance within two different sets of flexible tubes or channels which are integrated into clothing (or a wearable accessory) and which span the same body joint. This technology can be used to create a wearable, mobile, reasonably-priced, and relatively-unobtrusive full-body motion-capture system which can be used in diverse environments. Compared to camera-based motion capture systems, this invention can be mobile and does not suffer from optical occlusion.