A method includes: receiving, by a first processing device, first data from a first inertial sensor positioned on a user, generated when the user is in a body position； analyzing the first data to identify a posture of the body position； receiving, by the first processing device, second data from a second inertial sensor positioned on the user, wherein the second data are generated when the user performs a fundamental movement； analyzing the second data to identify a distinguishing characteristic of the fundamental movement； determining whether a correlation exists between the posture of the body position and the distinguishing characteristic of the fundamental movement； and, if a correlation between the posture of the body position and the distinguishing characteristic of the fundamental movement is determined to exist, displaying an indication of the correlation to the user on a second processing device.
