Forearm Balance pose – or Feathered Peacock Pose as it’s also sometimes called – strengthens the core, shoulders, and arms, while stretching the neck, shoulders, chest, and abdomen. It can help to relieve stress and anxiety, and improves circulation in the upper body. This posture requires a lot of shoulder and arm strength.
Using the block helps to keep the shoulders aligned, avoided collapse which cause misalignment. Placing pressure against the block keeps the elbows moving in toward the body and the shoulders engaged and lifted.