an insole device configured to fit the profile of the human foot to promote proprioceptive stimulation of the golgi tendon organ . the midfoot section of the insole device has an asymmetric domed structure that is presented to the plantar aspect of the foot at a location found to be the anatomical apex of the foot &# 39 ; s arch system . the asymmetric domed structure displays physical properties to catalyse muscle group balancing by using the body &# 39 ; s proprioceptive feedback mechanisms . the asymmetric domed structure displays physical properties such that it does not provide functional bracing or support to the plantar aspect of the foot . the net result will be a more structurally sound foot capable of more energy efficient and less injury inducing use . the plantar aspect of the insole or midsole device is characterized by a dominant cavity having the ability to receive and interchange the biofeedback catalyst and the many forms therefore , as well as being characterized by provisions to ensure proper and permanent placement of the catalyst .