Anne Kosko demonstrates this classic seated posture using a folded blanket and a yoga strap. The folded blanket under the hips helps the pelvis to tilt forward to release the low back. The strap catches the foot. Pressing the sole of the foot into the strap while the hands pull back creates some resistance which helps to extend the hamstrings. Over time with regular practice, a student can expect to be able to reach the foot while keeping the back extended and without over-stretching the hamstring muscles at the back of the thigh.
This benefits of this posture include easing low back pain and sciatica. It is a "hip-opener" which means it can help restore normal flexibility to tight hips. That also helps low back pain and knee pain.
