Standard knee action, right leg straight in the backswing was taught by the 5 SK (one founder was A GSED).
They shows that not straightening the right knee and keep the spine angle will result in moving the upper body across, limited shoulder turn and extensive arm movement up.
Do you agree their theroy? I believe it is one effective way to swing a golf club but not sure about the right leg straight theroy. Many pros are not doing that.
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