Abstract: A system includes a pressure sensor communicating directly, or indirectly, via a data processor, with a feedback device. The pressure sensor is located in an athletic surface, such as in footwear, sports boards, decks, or the like, to measure the pressure and/or force transmitted to a user's leg, ankle, knee, and so forth. The feedback device produces a signal, optionally an audible, visible, and/or tactile signal, to alert the user that the pressure or force has exceeded a pressure threshold.