If your hamstring muscles tend to be tight, it will be difficult to assume good golf posture. You may end up rounding your back and tucking your pelvis in with too much knee flex, as you address the ball, instead of bending from your hip sockets and keeping spine straight. Rounding of the back and excessive knee flex prohibit the amount of turn you can do in your backswing leading to swing faults. This is a variation of the hamstring stretch on the floor.
Stand in a shoulder width stance, holding a golf club across your thighs.
Keeping your back straight, lean over the club as if you were leaning over a balcony, keeping your legs straight.
Let you arms hang and bend over more feeling a stretch in your hamstrings. Relax your neck and hold position for 8 to 10 counts.
Return to start position and repeat for 8 to 10 repetitions.