Postural stability
BBS
ANTERIOR, POSTERIOR
Postural stability indices were evaluated using a Biodex Balance System SD (BBS, Shirley, NY, USA) with a circular platform that tilts up to 20° in a 360° direction. The platform stability was varied from 1 (least stable) to 12 (most stable). The angular excursion of the center of gravity was calculated in terms of overall stability, and Medial-Lateral (ML), and Anterior–Posterior (AP) stability indices [