Octogenarian Juliet Sherwood teaches Healthy Joints yoga classes at the Iyengar Yoga Center of Denver, where she follows a methodology developed by Francisco Kaiut. She has studied with many teachers over the years, including B.K.S. and Geeta Iyengar, Faeq Biria, François Raoult, and Patricia Walden. Learn more at iyengaryogacenter.com.