The ToePro/Hip Strength Dynamometer is now available for purchase. We've upgraded the dynamometer, adding a new strap attachment to it that measures hip strength. This strap attachment allows you to create a ratio between hip strength and body weight. Recent research confirms that when piriformis strength is less than 20% body weight, the individual is significantly more likely to be injured. ACL tears are especially common when a weak piriformis is present (7% of athletes who score less than 20% body weight will tear their ACLs each season).