This pose is very beneficial in helping to improve posture, and stretches and strengthens the shoulders, abdomen, and legs. Placing a block under the sacrum helps students with keeping their outstretched leg raised slightly and improves alignment in the hips and legs.
Single Leg Lift Variation with a Block: How to Do it Step-by-Step
Lie flat on your mat with a block placed under the sacrum.
Reach your arms overhead, and hold the edges of the mat with your hands, actively pulling the mat apart.
Reach your right leg toward the sky with a straight knee and let the left leg hover just above the ground. Keep the core engaged.
Hold this posture for 3-5 breaths, then slowly lower the right leg and repeat on the other side.