“…None of the previous studies have investigated the coupling of postural sway to optic fl ow in sports expertise. Most of the studies have focused on identifying postural sway in a stable stance ( Aalto, Pyykkö, Ilmarinen, Kähkönen, & Starck, 1990 ;Golomer, et al ., 1999 ;Perrin, et al ., 2002 ;Schmit, Regis, & Riley, 2005 ) or postural characteristics by manipulating task constraints ( Mouchnino, et al ., 1992 ;Hugel, et al ., 1999 ;Vuillerme, Danion, et al ., 2001 ;Vuillerme & Nougier, 2004 ;Gautier, Thouvarecq, & Larue, 2008 ;Matsuda, et al ., 2008 ;Stambolieva, et al ., 2012 ). There has been only one study of postural adaptation to imposed optic fl ow in experienced gymnasts ( Gautier, Thouvarecq, & Vuillerme, 2008 ).…”