Keeping a bent back knee (right knee for a right-handed golfer) through the entire backswing is important for added power and accuracy. If you straighten your right knee (for a right-handed golfer) as you begin your backswing then you will lose the natural coil that should be generated in the large hip and leg muscles. This coiling force, or ‘loading,’ is what helps accelerate and drive your hips and legs forward during the downswing and produces greater explosive power through the ball at impact.
Furthermore, if the back knee straightens during the backswing, you can over-swing with your arms and reverse pivot your spine angle at the top contributing to the common swing errors during the downswing of coming over-the-top and casting. This outside-to-inside swing path and early release of the club causes a weak fade or slice so both distance and accuracy are lost.
A typical ‘physical’ cause evaluated with many golfers is their inability to maintain a bent (flexed) back knee during the back-swing due to hip rotation tightness. If the right hip (for a right-hand golfer) is inflexible then it will not properly rotate during the backswing. Restricted hip motion causes the knee to straighten so you can still complete a full backswing. This straight knee compensation movement, however, prevents the proper resistive coil in the right hip at the top of the backswing and is essential in your effort to avoid the upper body from reverse pivoting during the backswing.
A great exercise that helps to improve hip rotation flexibility and maintain a bent back knee in your backswing is the ”Single Knee Trunk Twist.”
- Kneel tall on a padded surface and perform a pelvic tilt, squeeze your shoulder blades together, inhale and reach a medicine ball/dumbbell free weight out in front of your chest. Then, as you exhale, slowly rotate your upper torso as far as possible and keep your arms stable in front of your chest through your full turn.
(Note! Be sure to keep your shoulder blades squeezed together, your hands connected to the front of your chest, and your front leg stable as you rotate)
Hold this rotated position for one full swing visualization, then inhale as you relax your upper torso back to the starting position.
Repeat 1-3 sets of 10-15 repetitions in both directions, 1-3 times per day.
When you are ready to increase the difficulty of this exercise:
- Increase the weight of the med-ball
- Rotate your torso and swing your arms faster and through a more complete range of motion.
For more information on golf fitness training and injury prevnetion, please contact Paul Callaway, PT, PhD by calling: 630.567.7572 or email: Paul@CallawayGolfFitness.com