Free your pelvis and relieve your back pain with these two Yoga hamstring stretches: Dandasana and Paschimottanasana. You’ll begin with Dandasana, also known as “Staff Pose.” Dandasana is an easy pose where you are sitting upright with a forward bend posture that will help improve your sitting posture and core strength. Ready to take it up a notch? Paschimottanasana will take you to the next level of flexibility by lengthening the hamstrings as you lean forward to hold the feet.