While several styles of yoga can help strengthen your body, ashtanga’s heavily repeated series of vinyasas—chatarunga (a yogi push-up), up dog, and down dog—between each pose (and on each side!) is guaranteed to make you strong and fierce, says Lauren Imparato, a certified yoga instructor and owner of the I.AM.YOU. Studio in New York City. Holding the poses, with this repetition of vinyasas in between, will develop targeted muscles in every part of your body, including those you never knew you had.
Find it: Imparato recommends looking for classes with names like “led primary series” or “basic ashtanga." And, if you are comfortable simply watching and following along without a teacher giving instructions, look for “mysore” classes.