Ever wondered how to do the perfect crunch? Here's a step-by-step guide to correct form.
-Crunches: Lie on back knees bent 90 degrees, feet on floor, and hands extended in front so they are touching knees. Curl up for 5 seconds sliding hands past knees. Squeeze abs and hold for 2 seconds then slowly lower until shoulder blades touch the floor. Repeat as many times as you can while maintaining proper form.