Triangle pose is great for stretching the hamstrings, groin, hips, chest, and shoulders. It strengthens the back and entire lower body and can improve symptoms of sciatica and flat feet. It helps to relieve lower back pain, stress, and digestion.
Adding a block under the lowered hand is hugely beneficial for students who have lower flexibility in the legs and side body, as they will often reach for the ground and lose integrity in the shoulders and chest. Placing their hand on a block ensures that the chest stays open and helps to improve posture.