If you're looking for a workout that will challenge your flexibility and give your booty a boost, look no further than the Flex and Stretch Challenge! For 14 days, you'll work out with fitness models Scarlette Leithold and Alexis Ren. The workouts include a combination of strength-building exercises and stretches that will create more space in your muscles. You'll see results in no time - so why wait? Start the Flex and Stretch Challenge today!