My only criticism of putting your hands behind your knees is that you do NOT really have a rock solid physical lock in. You may notice movement up and down on those who use this approach. With the GD, you have the best lock in mechanism available, with no movement what so ever.
Gerry, during his clinics, is constantly harping on "can you feel your lock in?" You can't feel a lock in if you don't have one.
Bob P.
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Bob P.
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