Abstract: A wearable, flexible, bio-sensing housing with physical feedback, with software running on a user's wirelessly connected smart device. The housing has embedded at least one of pressure, movement, temperature, velocity, and acceleration sensors, and at least one of a haptic, vibrational, audio, visual, kinesthetic, tactile, olfactory, thermal, vestibular, and somatosensory feedback mechanisms. The feedback being triggered by measurements from the sensors and predetermined parameters, as compared by the smart device's software and/or a connected server. With real-time measurements and real-time feedback directly to the user's body, the user can perform real-time adjustment of his activity to obtain optimal performance and/or health.