Why are archers lie on their backs to shoot an arrow?

There are several forms of the sport of archery. They include bow hunting, target archery, field archery and flight shooting. In flight shooting the object is to shoot the arrow as far as possible.

Special bows with a draw weight of up to 91 kg (200 lb) are used, and small lightweight arrows. In ordinary flight shooting, archers shoot while standing. But in free-style flight shooting, arches lies on their backs with the bow strapped to their feet. This enables them to use both hands to draw the bow. In this way, expert archers can shoot farther than 640 m (700 yds).