Left knee collapsing on backswing

Been giving this a bit of practice down at the range this week. Seems to be going well at the moment.
I have noticed that when I take the club back and keep my left knee straight (not collapsing left) that my knee has a tendency to push forward.
Feels strange at the moment but certainly helps in the downswing as there isn't a knee in the way!

Been watching the pros on the telly and have noticed that many actually do the same. I must be doing it right then. Am I?

You Might Also Like