http://www.disabled-world.com/sports/archery-bowhunting.php
Last paragraph of article:
Perhaps the most useful piece of adaptive equipment is referred to as a, 'draw loc.' A draw lock holds the person's bow at full draw until a trigger is activated. While a draw lock-equipped bow is essentially the functional equivalent of a crossbow, the experience of using such a bow is similar to that of using a compound bow instead of a crossbow. An advantage of of using a draw loc is that persons who are strength impaired can draw the bow between their hands and feet using their stronger back and leg muscles. One down point to the use of a draw lock is that it does add weight to the person's bow.
Citation: Disabled World News (2009-06-29) - Archery is a sport that nearly anyone can pursue despite disability and target archery has been a Paralympic sport for greater than thirty years: http://www.disabled-world.com/sports/archery-bowhunting.php#ixzz2Snon8s7G