AKDOUG's explanation is perfect it can't be said any better.For myself a back tension triggerless release saved my participation in the sport.I have hunted with a Carter Colby.I now hunt and Practice year round with a Tru Ball Pinky boss,a release that is triggered with your pinky.Once you have retrained your mind and your body(99% your mind)you can use any release with back tension.There are plenty of articles on the web that illustrate the physical process of shooting with back tension.