CaptionWhether you’re a yoga novice or seasoned yogi, it can be hard to figure out what kind of class best suits your mood and needs. Here’s the real deal on 15 popular yoga methods so you can find the flow that will leave you feeling calm and restored.Getty ImagesSivananda is based on five principles: proper exercise, proper breathing, proper relaxation, proper diet and positive thinking. Classes are slow and highly structured. After a sun salutation warm-up, yogis engage in 12 asanas, from a headstand to a triangle pose, in the same order each time. Some of these poses are pretty tricky, especially the peacock, which is basically a handstand using only your forearms.