“…During these transitions, astronauts experience deficits in both perceptual and motor functions (Kozlovskaya et al, 1981 ; Reschke et al, 1994 , 1998 ; Clement and Reschke, 2008 ). Post-flight locomotor control and segmental coordination show changes that include disruption in spatial orientation during overground walking (Glasauer et al, 1995 ), alterations in muscle activation variability (Layne et al, 1997 , 1998 , 2001 , 2004 ), modified lower limb kinematics (McDonald et al, 1996 ; Courtine et al, 2002 ; Bloomberg and Mulavara, 2003 ; Miller et al, 2010 ), alterations in head-trunk coordination (Bloomberg et al, 1997 ; Bloomberg and Mulavara, 2003 ; Mulavara et al, 2012 ), reduced visual acuity during walking (Peters et al, 2011 ), and alteration in the selection of appropriate landing strategies after jumping (Newman et al, 1997 ; Courtine and Pozzo, 2004 ). Astronauts also show impaired postflight functional mobility in terms of their ability to complete an obstacle course (Mulavara et al, 2010 ).…”