In case that users exercise for healthcare, the users require the effect of exercise. The most useful index of the effect by exercise is "Energy Consumption", and the most accurate measuring method of energy consumption is to measure respiratory metabolism by Douglas bag that is not wearable instruments. The object of this study is to construct the "Wearable Information Healthcare System". As the first step of this study, the algorithm of accurate measuring of energy consumption especially in the low-load area and wearable energy consumption measuring system are development. The new algorithm is evaluated in the field test, and the calculated value is agreed to the true value.
