1. Lay on your back on a soft workout surface with your arms spread out to each side (forming a ‘T’ shape), and your legs outstretched on the floor (no siestas!)
2. Contract your lower abdominal muscles to bring your legs up and off the ground by about 3 inches, this is the starting position
3. As you exhale, elevate your legs (keeping them straight) to one side before lowering them back down to the centre and then up to the opposing side to and then back down to the centre to complete one rep
The primary muscles used in Windshield Wipers are the Abs. The secondary muscles used are the Obliques.