The Latissimus Dorsi as an Accessory Muscle of Breathing . Slumping the back and collapsing the chest is a common occurrence in Sukhasana, especially in those who are new to yoga. Factors that can contribute to this posture include fatigue, defeated mental state, and tight muscle groups. Many yoga poses are designed to counteract these factors, Sukhasana being one of them. Sitting up in Easy Cross-Legged Pose aids to bring the spinal column into alignment, so that the vertebral bodies and their