3. BACKSWING
a) Collapse left knee
b) Keep left arm straight but not rigid
c) Turn your body in a barrel
d) Weight remains on balls of feet
e) Keep your grip pressure constant
Collapse left knee
Over-flexing your left knee, like McIlroy does, allows you to free up your hips during the swing.
Keep left arm straight but not rigid
McIlroy has one of the straightest arms at the top of the swing in professional golf - getting somewhere near that will give you a consistent backswing.
Turn your body in a barrel
Imagine your body is trying to turn in a barrel when making the backswing, moving your hips on the axis clockwise.
Weight remains on balls of feet
If your weight stays in the centre of the balls of your feet on the backswing then this will help the consistency at impact.
Keep your grip pressure constant
Throughout your swing, if you are a right-handed player, you should be applying more pressure with your left hand on the grip as this hand guides the club.
NOW CHECK OUT SWING TIP 4, THE DOWNSWING