Jennifer Lawrence is known for her clumsiness, honesty, and great sense of humor. She burst onto the scene with her lead role in The Hunger Games a few years ago and has been working on changing Hollywood's ideal body size for young women. Here's how she stays fit! 1. All it takes is 20 minutes Try a five to ten minute warm-up followed by 20 minutes of high intensity cardio. JLaw toned up by skipping. 2. You should be seeking muscles To become a fast (or faster) metaboliser, you need to gain muscle. See results by doing “bodyweight squats, push-ups and sit-ups all performed in a circuit,” says Dr Horrigan. 3. Recovery still means doing something Lawrence’s go-to was yoga incorporating sun salutes, reverse warriors, chair poses, planks and tree poses. 4. Be committed but keep things interesting If you do the same workout day in, day out, you won’t see results. Change up the cycle so your body doesn’t get too complacent. 5. Attitude is everything “She was never late. She never missed a workout. She never complained. She did everything that was asked of her and she usually did so with a smile,” Dr Horrigan says of Lawrence.