An exercise expenditure monitor device and method for monitoring a user's
caloric expenditure at exercise, the exercise expenditure monitor device
including a heartbeat sensing device for detecting heart rate of the
user, a reference storage unit for storing a standard heart rate and a
reference heart rate of the user at rest mode, an individual physiology
database for storing data of physiology weighted value and a set of
individual physiological parameters inputted by the user including sex,
age and weight, each set of individual physiological parameters
corresponding to a physiology weighted value, a calculating unit which
calculates a general caloric expenditure of the user according to an
algorithm including dividing the heart rate difference between the
exercise heart rate and the reference heart rate by the reference heart
rate and multiplying by the physiology weighted value. Preferably, the
exercise expenditure monitoring device includes an activity mode
selection unit for storing data of activity weighted value and the item
of activity that the user takes e.g. walking, jogging, running, jumping,
cycling or aerobic dance. Each activity corresponds to an activity
weighted value which is provided to the calculating unit which multiplies
the general caloric expenditure by the activity weighted value and
obtains a true caloric expenditure of the user.