Abstract: A biomechanical analysis and validation system and method suitable for clinical diagnosis while providing accurate measurements of the angles of lower body segments and joints (i.e. without undue drift error and gravity vector estimation error). The system and method use inertial sensors configured to be positioned at the pelvis, the right and left thigh, the right and left shank and the right and left foot, and, optionally plantar pressure sensors to be positioned under the right and left foot of a subject. Biomechanical information of the subject is provided by expressing the orientation of the inertial sensors with respect to the orientation of the lower body segments of the subject.

Abstract: A biomechanical analysis and validation system and method suitable for clinical diagnosis while providing accurate measurements of the angles of lower body segments and joints (i.e. without undue drift error and gravity vector estimation error). The system and method use inertial sensors configured to be positioned at the pelvis, the right and left thigh, the right and left shank and the right and left foot, and, optionally plantar pressure sensors to be positioned under the right and left foot of a subject. Biomechanical information of the subject is provided by expressing the orientation of the inertial sensors with respect to the orientation of the lower body segments of the subject.

Abstract: A system and a method for monitoring activity and posture of a person in correlation with the person's heat activity, comprising a) simultaneously detecting first linear accelerations and first angular speeds of rotation of an upper part of the person's body, second linear accelerations and second angular speeds of rotation of a lower part of the person's body, and the person's electrocardiogram signal; and b) determining the person's activity and posture from the first and second linear accelerations, the first and second angular speeds of rotation, and at least one of: i) a derivation signal, ii) heart rate and iii) a respiratory rate, of the person from the electrocardiogram signal.