Newbies can try any introductory-level class, but if you are looking for a practice that is detailed and full of direction, go with iyengar. “I don't think that anyone would argue that Iyengar is the ‘original gangster’ of yoga,” says Sara Ivanhoe, a certified Yoga Works instructor and star of the Weight Watchers Yoga Starter Kit. “His attention to detail and step-by-step instruction has been the basis of most current styles." This slow-paced class incorporates props such as straps, blocks, bolsters, and blankets in order to aid in more precise postures and poses and will challenge your body in a safe, educational manner, Ivanhoe says. It's also great for more experienced yogis who are injured or pregnant.