Fig. 1

Measurement system and set-up. a Rigid bodies comprised of 4–5 passive markers were created to enable the kinematic tracking of the sensors using the Vicon optoelectronic motion-capture system. b AHRS were solidly affixed to those rigid bodies using double-sided tape and straps in order to minimize relative motion. c The bundles hence created (rigid bodies + AHRS) were positioned on the participants’ dorsal side of the left feet (on the shoe), halfway in the medial surface of the left tibia, two-thirds up the lateral fascia of the left leg, at pelvis level (L5), upper back (about T2) and on the side of the head, above temporal level