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Iyengar

Good for: Injury-prone people

As in many types of yoga, the poses you'll do in an Iyengar class are traditional. The difference is in how those poses are done. Iyengar teachers are trained in biomechanics, so they understand which positions are most likely to cause injuries—and how to modify them by tweaking your form and showing you how to use props to make them less intense, says Stephens. Plus, a pause between poses (as opposed to flowing from one to the other) allows you to perfect your position, so you're less likely to strain something.

Iyengar may even help you recover from injury. A study in the Archives of Internal Medicine found that a similar style of yoga, Viniyoga, worked wonders on chronic low back pain in just 12 weeks.

Next: Step 2: Find the right class