System and method for capturing and analyzing motions to be shared

A method for capturing motion performed by a user, the method comprising:

• providing a plurality of sensor modules respectively attached to different body parts of a first user in accordance with a predefined activity;
• receiving sensing signals from the sensor modules when the first user performs the motion related to the predefined activity, wherein the sensor modules are synchronized in time so that the sensor modules share identical timing of movement;
• determining a set of attributes of the motion from the sensing signals, the attributes being represented in a 3D anatomical coordinate system, where a vertical anatomical axis Y in the anatomical coordinate system is constructed by gravity direction, a medio-lateral anatomical axis X in the anatomical coordinate system is constructed in order to be driven by the vertical direction, an anatomical axis Z in the anatomical coordinate system is constructed as a cross product of the axis X and the axis Y in complying with an orthogonal right-handed rule, a predefined relation between the sensor modules and joints of the first user is used to represent the attributes of the motion in the anatomical coordinate system so as to have a reliable representation of an anatomy behind.