PORTABLE DEVICE, SYSTEM AND METHOD FOR MEASURING A CALORIC EXPENDITURE OF A PERSON'S PHYSICAL ACTIVITY

摘要

The present invention relates to a portable device for measuring a caloric expenditure of a person's physical activity, said portable device (10) comprising: -girth measurement means (12) for measuring changes in girth of a body part (16) of the person (20) over time to generate a girth signal (18, 18'), said body part (16) being a part of the person's body that varies in girth due to muscle activity during the physical activity,and -processing means (14) for analyzing the girth signal (18, 18') to determine a measure for the muscle tension of said body part (16), for determining a level of physical load of the person's physical activity depending on the determined measure for the muscle tension, and for calculating the caloric expenditure of the person's physical activity based on the determined level of physical load of the person's physical activity.