PCT No. PCT / JP97 / 02029 Sec. 371 Date Feb. 9, 1998 Sec. 102(e) Date Feb. 9, 1998 PCT Filed Jun. 12, 1997 PCT Pub. No. WO97 / 47239 PCT Pub. Date Dec. 18, 1997In order to obtain 
calorie expenditure with good accuracy, the device is provided with a basal 
metabolic state specifying element (142) which specifies the subject's basal 
metabolic state from his body temperature; a correlation storing element (151) which stores respective regression formulas showing the correlation between the 
pulse rate and the 
calorie expenditure when the subject is at rest or active; a correlation correcting element (152) which correcting the stored regression formulas using the basal 
metabolic state; a body motion determining element (104) which determines whether or not the subject is at rest; and a regression formula selecting element (153) which selects the regression formula which should be used in accordance with the results of this determination. The subject's 
pulse rate is applied in the selected regression formula, and the 
calorie expenditure corresponding to this 
pulse rate is calculated by calorie expenditure 
calculator (162).