Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Christie Brinkley, 66, is doing at-home backyard workouts on her Total Gym.

"I know If I don’t get the exercise I need, I really feel it! My body just instantly rusts! Gotta grease the joints," she captioned an Instagram video of her workout. "So in order to avoid having to ...