What's so important about toning up your midsection? Well, other than the obvious reason, which is that lots of gals like to look hot and svelte in their bikini, strengthening your core helps you sit taller, look more lean, and prevents back injuries.
Strengthening your core is the central philosophy of pilates, which this video tutorial is inspired by. Watch and follow exercise guru Sarah to learn how to do a challenging ab routine that'll guarantee those bikini-ready abs last all year long.
Try this ab workout 3 days a week on nonconsecutive days before your cardio to get a flat stomach. This ab workout is similar to the Pilates Core Workout.