Spinal mis-alingment is a common mistake among many golfers. If the spine is not aligned and stacked squarely on top of the hips, the golfer will have limited ability to rotate the torso and hips in the golf swing. Being out of alignment can also lead to injury.

Ideally, the spine should be aligned in one straight line from head to tailbone. This will allow optimal rotation of torso and hips. This exercise will help stretch and strengthen the hips and muscles around the spine to handle rotation in golf swing and increase mobility in hips.

Assume a plank position on the floor, keeping your hand aligned under your shoulders and arms straight.
Take you right foot and move it to the opposite hand so that your leg forms a right angle on the floor.
Return to the start position and repeat on opposite leg.
Maintaining neutral and straight posture, alternate moving legs up under the shoulders in a dynamic fashion.
Do 10 repetitions on both legs.
This exercise can also be done statically by holding the position on each leg for 30 seconds