The invention relates to a health management system comprising a body or limb movement detecting means for detecting the movements and position of a users body or limb(s) in 3D space, a movement analyzing means for analyzing the data of the measurement carried out by the body or limb movement detecting means, wherein the body or limb movement detecting means comprises at least three sensors or markers for tracking a user's body or limb movement in 3D space by measuring an angle embedded by two body parts of the user which are connected to each other by a joint being the apex of the angle to be measured, at which one of the sensors or markers is provided. To detect the offset a change in distance between two neighboring sensors or markers indicates an offset of the sensor at the joint spaced apart from the apex.