Ah, but here's the issue. Just lay your hand flat on the table, all your fingers point the same direction. 0 in the fingers requires you to bend your fingers further under towards your palm. You don't need to bend them that much to get the effective lift. Also, your thumb isn't nearly as flexible as your fingertips. Most people can bend their finger tips under and actually touch their fingers and/or palm. You can't bend your thumb back to touch your wrist, most people actually can't even get it to or past 90 degrees from their palm.
Reverse in the thumb is and isn't a quicker release. Reverse in the thumb can theoretically be quicker release if you're bowling in space where there's no force or gravity on your hand and arm. All reverse REALLY does is make you grip or squeeze tighter to hold onto the ball throughout the entire swing, then precisely at the release you have to relax to get out of it . . if you have a proper length span and don't have to apply much pressure with your thumb to hang onto the ball, and it exits straight, less reverse is EFFECTIVELY a quicker release than more because of gravity, physics, and its resulting effects on the swing. More reverse makes you have to grip, squeeze, or put more pressure on the ball with your thumb to hang onto it throughout the entire swing.
Because we want the thumb to come out clean, leaving the fingers to create the roll, we need to achieve an EFFECTIVE quick (maybe not quick, clean) release rather than a theoretically quick (clean) release. That's what people have gotten backwards for so long. Yes, more reverse SEEMS like it would be a cleaner or quicker release, but people never factored the entire armswing into that. The less you grip through the armswing, the cleaner and quicker the release will be. Some people with a lot of reverse swear they aren't gripping it, but they really are, that's just what they're used to.
Then you have to figure out at what angle your fingers are most effective at also. There's a certain point your fingers like to bend to. Hold your hand by your side. Your fingers naturally curl, right? Straightening them requires use of muscles, and balling them or curling them more also uses muscles. May not feel like much, but straighten your hand, then ball your fist repeatedly several times, and you'll start feeling it in your forearm. It requires much less effort to angle the fingers close to the direction they most comfortably lay in, this will increase your stamina number one, plus allow you to hold onto the ball and get the proper rotation with the least amount of physical effort exerted. The physics of a proper armswing and release create all the rotation and speed you need without having to add muscle to it, and the less muscle the better. A natural, comfortable hand position will allow you to use gravity and the swing to your advantage, and in most cases create a better, more dynamic roll. Less muscle and stress on your hand equals better and easier repeatability for a much longer period of time.
Gizmo,
Some very specific questions I am interested in.
It seems that you are saying most bowlers hands that have anatomy that favors reverse fingers and 0 or near 0 forward reverse in the thumb.
By old theories of 0 forward reverse in the fingers(based on flexibility) and reverse in the thumb on spans over 4 1/4. These theories get the thumb out quickly and then let the ball to ride for a long time on the fingers if there is a flat spot
So some questons.
1. For the same hand that accommodates those old 0 pitch forward back fingers and reverse thumbs switched to reverse fingers and 0 thumbs what is the change in timing look like? How does the arc of the swing change to keep the balls on the fingers?
2. Does the span have to lengthen?
Thanks,
Luckylefty