Patent ID: 8781569

Claim:
A biometric information processing device comprising: a heart rate detection unit that detects a heart rate of a subject; a relative heart rate calculation unit that calculates a relative heart rate, which is obtained from a first difference over a second difference, the first difference being by subtracting a prescribed resting heart rate of the subject from the heart rate, the second difference being by subtracting the prescribed resting heart rate from a maximum heart rate being based on an age of the subject; a relative oxygen intake calculation unit that calculates a relative oxygen intake based on the relative heart rate; an oxygen intake estimation unit that estimates the oxygen intake from the relative oxygen intake; and a calorie expenditure calculation unit that calculates calorie expenditure based on the oxygen intake, HR being the heart rate, HRrest being the resting heart rate, HRmax being a peak heart rate defined as a function of age of the subject, the relative heart rate calculation unit calculating the relative heart rate RHR using the HR, the HRrest and the Hrmax, when the relative heart rate is smaller than a predetermined value, the relative Oxygen Intake being regarded as 0.