The way your body winds up is shoulders, hips, knees and feet. If you think about this as a whole movement from the club head to your feet, the first thing to move is that which has to travel the furthest in the back swing. Then on the down swing the reverse happens (imagine a baseball pitcher). The last thing to wind up or move on the back swing is the first thing to move on the down swing. Feet, knees, hips, shoulders, arms, hands, bottom of grip, shaft, club head.
There is little rotation movement to position 1 except your forearms have rotated slightly clockwise and shoulders about a 1/3 turn, there is however resistance already at this stage, try to keep hips and knees in there original position. Naturally your hips want to rotate with your shoulders as it is stress free to do so but if you can resist you will create more tension and torque in your muscles, that is power wind up! Take not that your wrists will have started to hinge (not roll).
Now that we have the club in a near perfect position we need to wind up the power with more shoulder and torso rotation (remember your shoulders rotate around your spine which is on a tilted axis, this means your left shoulder will be lower than your right), your hips will most likely rotate with this move but try to resist excessive hip rotation. The older we get the more hip rotation is needed to create a full body rotation.
Your right knee will now be feeling the strain and once again resist the natural tendency to straighten out your leg to release the tension. Loading more weight onto the ball of your right foot will help maintaining the power wind up, approx 70%. Push down into the ground under your right foot to load and keep flexed. Feel your thigh muscles are engaged to hold your knee in position.
At position 3 (full backswing position) your left shoulder will be down under your chin, full power wind up is complete and there will be great strain throughout your muscles if you hold this position for more than 3 seconds. A good mental image is of many sporting actions like throwing a ball or the baseball pitcher, weight loaded on there back foot with full wind up ready to unleash the power.
The above YouTube links show how your body unwinds starting from the floor up and not just by swinging the club. You will see how there is a slight weight shift in the feet, this is crucial then the unwind begins with the knees, then hips, torso, shoulders, arms and then club. At impact your shoulders will be parallel to the ball to target line but your hips will have rotated past parallel to the target line.
Maintaining your height as you unwind is extremely important, I see a lot of amateur golfers lift up just prior to impact or lean to the right. Your weight shifts towards the target first then right foot fires as you swing down and turn your hips, hold the wrist angle as long as you can until the impact area, weight shift onto the inside of your big toe then pivot and push off. If this sounds complicated just imagine the right foot action when throwing a ball.
Holding a perfect balanced follow through pose will be the aim on completion of this athletic movement (people say golf isn’t exercise!!!).