In 21 days, you could get beach-ready for a vacation. Look drop-dead great at your upcoming reunion. Or jump-start a major weight-loss goal. It's simple, it's fast, and it works. So stop wasting time on diets that don't get results. If you're ready to get serious, 21 Day Fix can help you lose the weight. Ready for a major calorie burn in only 30 minutes? We made these workouts short so you can get in, get out, and get on with your day. But that's no excuse for taking it easy.