If you have ever had an uphill lie on the golf course, you probably have discovered that they are easier to hit shots off of than hitting shots off of a plain flat lie. This is because the uphill lie helps you shift your weight into your back hip at the top of your swing.
A reverse pivot happens when the weight goes towards the target on the backswing and the weight ends up on the forward leg at the top of the swing. The spine may also tilt towards the target on the backswing indicating a classic reverse pivot. In a reverse pivot it is virtually impossible to create momentum on the downswing resulting in loss of power. For many, a reverse pivot comes from having a stiff neck. If your neck is stiff or lacks flexibility then it is virtually impossible to rotate your body correctly.
Here is a drill using the CardioGolf™ Slope to help you eliminate the reverse pivot.