Many of them have been leading active lives since grade school, and they swear by healthy habits like superfood smoothies and more than 8 hours of sleep.  Yoga Clothes You Can Wear With Heels   In most cases, they’ve also made being active not just a passion, but a profession. If their toned physiques and glowing complexions featured here don’t inspire you, maybe a workout with them will? Colleen Saidman Yee, Owner of Yoga Shanti, Age: 52 Saidman Yee might be a former model, but she credits 25 years of yoga with keeping her young.  In addition to running her Hamptons studio and teaching at workshops and festivals around the country, she just released a new A.M. & P.M. Yoga DVD with husband Rodney Yee. “I believe that stagnation is an aging culprit,” says Saidman Yee. “Practicing yoga keeps the circulatory, respiratory, and digestive systems functioning optimally.” Best Natural Makeup For Spring   Yoga also protects her from the ravages of stress, and she complements her practice with flax-and-omega packed smoothies, long, hot baths, quality sleep, and “lots of laughter.”  Ruth Zukerman, Co-founder of Flywheel Sports, Age: 54 Zukerman has been in the fitness industry for 30 years and today teaches an average of 10 Flywheel spin classes a week. Sweat, she says, is key to looking and feeling great. “Despite the bodily changes that we women experience in our fifties, sweating through exercise has kept my body toned, my pores clear, and my skin firm.” She also is sure to get enough sleep and maintain a balanced diet (with a daily avocado!). “A friend of mine once referred to me as ‘The Fountain of Ruth,’” says Zukerman. “I hope to be worthy of that name for many more years!” Check out 5 more gorgeous women with Well+GoodNYC’s 50 And Fabulous: These 7 Women Prove That Fitness Is The Fountain Of Youth.