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.

Before you start, be sure to foam roll and do a dynamic warmup. After the warmup, grab a set of medium-weight dumbbells. If you aren't sure how to choose your dumbbells, use this guide. This workout ...