Patent ID: 7237446

Claim:
A system for measuring gait kinematics information during exercise of a subject comprising: a fixing member adapted for fixing onto the trunk of the body of the subject; an acceleration sensor attached to the fixing member for sensing the vertical acceleration of the trunk of the body of said subject; and a microprocessor coupled to said acceleration sensor, said microprocessor configured to receive vertical acceleration data from said acceleration sensor, to compute and derive the speed and distance traversed by said subject using the algorithm of the form D Tc = K a * ( 1 - K t ) * S T c K cal V Tc = K a * ( 1 - K t ) * S T c K cal * T c Wherein: D Tc is the actual distance, V Tc is the actual speed, S T c is the acceleration signal-changing rate, K t is the time shift compensation factor, K a is the amplitude shift compensation factor, K cal is the calibration constant, and to communicate said speed and distance information to a receiving device.