In order to create power in your golf swing, you need to set up in an athletic position. Where some high-handicappers go wrong, is that the sit too much into their heels and tuck their hips under inhibiting the amount of hip turn and movement they can create in the golf swing.

Ideally, you want to create hinge from your hips with a relatively straight spine. This will put you in an athletic position. This exercise will help you strengthen muscles to create the proper hip hinge.

Use a kettle or dumbbell and place it on your chest.
Set up in you golf stance.
Bend over as you press your hips back. Feel tension in your hamstrings and glute muscles.
Hold the bent over position for a moment, then squeeze the gluten as you return to the start position.
Repeat motion smoothly bending forward and standing back up.
Repeat for 8 to 10 repetitions.