Learn the Secret That Reese Witherspoon Just Spilled to Women's Health

On how she stays fit: She grabs her girlfriends. "There’s a group of us, and I’m like, 'Ok girls! What are we doing today?'" Often, it's Body by Simone — "It incorporates dance, strength training, and stretching, and it’s all in an hour, which is perfectly doable for me. I do that a couple times a week. I also run, I Spin, I do yoga. Physical strength is important."

On advice that she would give to her younger self
: "I would just not worry so much. I worried a lot in my early twenties. My twenties I worried so much about 'Was I doing a good job?' and was so hard on myself and now I’ve gotten a little bit older and realized 'You’re gonna get there!' You don’t have to stress about it, or be anxious about it, because it actually doesn’t help. And just keep working hard. It’s no secret. You have to work really hard."