Windshield Wipers

1. Hang from a pull-up bar. Brace your abs.
2. Slowly bring your feet up with straight legs by contracting your abdominals.
3. Rotate to the left and to the right in a controlled movement with straight legs.
Should mimic the same movement as a windshield wiper on a car.
4. This is a very difficult exercise. Maintain strict form and tempo.