Parvatasana, also known as the Mountain Pose, is a foundational yoga posture that improves flexibility and strengthens the back, shoulders, and legs. If you're wondering how to do Parvatasana, start in a seated position, then move into Vajrasana (thunderbolt pose). From there, raise your arms above your head, keeping them close to your ears, and stretch upward with palms together. Hold the pose while breathing deeply to feel a full-body stretch.