Straightening of the right leg.

I've a tendency to straighten my right leg on the back swing. Does anyone know of any drills to prevent this.

Just concentrate on placing your weight on the toes rather than on the heels, you cant fully straighten the leg if you do this.

D.

Just to add to Darryl's post, make sure you are bending from the hips, not with your back. You have to make a concious move to stand up on your right leg when bending from properly the hips.

A couple of drills:

Have a partner stand behind you facing your back kneeling low, and place a driver with its head cover on your back right leg's knee. Use that as a brace to feel your leg staying flexed throughout your takaway and at the top.

When you are playing, think of your back leg as screw that goes downward into the ground as you take the club back.

Make sure your right leg is bent to begin with at address. With practice you will be able to maintain the bent leg, however watch out! You don't want your right knee to slide to the right, otherwise you'll lose the coiled up energy.

Also make sure your right toe is pointing 12 o' clock from address to the backswing.