I prefer in-person yoga and workout classes, but there’s one online instructor whose routines I always search for when I want to move my body at home and that’s Adriene Mishler, aka Yoga With Adriene.

Women’s Health’s five Winter Issue cover stars each built a following by forging their own path in the fitness world. Now, they’re co-leading the Women’s Health Flex Challenge, 28 days of workouts you ...