The invention relates to a physiological feedback system for providing breath guidance signal and breath behavior information so as to being used as foundation of performing breath behavior adjustment in a breath training segment for users, and then a feedback loop can be implemented. The system includes a wearable physiological sensing device having a breath action detection unit provided at breast or belly of the user for acquiring ups and downs motion of breast and/or belly generated by carrying out breath by the user, and a light emitting source for generating a visual perceptible signal including a luminous intensity variation and a luminous color variation, wherein the visual perceptible signal expresses the breath guidance signal through the luminous intensity variation, and expresses information related to breath action of users through the luminous color variation so that the user can perform a breath behavior mode in accordance with the luminous intensity variation, and adjusts breath action in a period of breath through self conscious in accordance with the luminous color variation for achieving influences for physiological state.本發明關於一種生理回饋系統,用以提供呼吸導引訊號以及呼吸行為資訊,以作為使用者在一呼吸訓練區段中進行呼吸行為調整的基礎,進而達成一回饋迴路,該系統包括一穿戴式生理感測裝置,具有一呼吸動作感測單元,設置於該使用者的胸部或腹部,以取得使用者因進行呼吸而產生的胸部及/或腹部起伏動作,以及一發光源,用以產生包括一發光強度變化與一發光顏色變化的一視覺可感知訊號,其中,該視覺可感知訊號透過該發光強度變化表現該呼吸導引訊號,並透過該發光顏色變化表現相關使用者呼吸動作的資訊,以讓使用者可根據該發光強度變化而執行一呼吸行為模式,以及根據該發光顏色變化而透過自我意識調整其於呼吸期間的呼吸動作,以達成對生理狀態的影響。20‧‧‧呼吸動作感測元件22‧‧‧發光源
