I would like to hear of different opinions/experiences regarding shoulder rotation in a pivot-driven swing.
In a pivot-driven swing, the pivot action should start with a lower body shift rotation move that causes the pelvis to shift left-laterally. That causes the lumbar spine to also move left-laterally and if the head is kept stationary a golfer develops increased rightwards spinal tilt (secondary axis tilt). That, in turn, allows the right shoulder to move downplane when the upper torso subsequently rotates.
Two questions:
1) How much of your shoulder (upper torso) rotation is due to active contraction of mid-upper torso muscles and how much is due to passive forces being transferred from the lower body to the upper body via the spine and external torso muscles/ligaments?
2) Here is a diagram showing the kinetic sequence. I have placed small photos of Aaron Baddeley's swing in the diagram showing my perception of when his his pelvis and shoulder rotation reach their peak rotational speed.
When do you think that your shoulder rotation reaches its peak rotational speed in your swing?
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