The trouble, though, is that America's forces were designed for sprints, not marathons.

The 22-year-old sprinter knows she faces red-hot competition from a star-studded line-up but promises to keep her head high and proud, even if she finishes last.

Three were related to object control (kicking, catching and overhand throwing), and four were focused on locomotor skills (hopping, side galloping, vertical jumping and sprinting).