I have a wrist release and I shot a few arrows with a friends TruBall handheld release. His bow tension is much higher than mine, but for some reason when I used his release, it was much easier for me to draw his bow. I didn't have my bow available to try it with, but have drawn his bow in the past using my release and it certainly seemed to have been much more difficult. Are there really that many different muscle groups being utilized between the two styles of releases?