Foot Tap Crunches
This foodspring video shows you how to do foot tap crunches (a.k.a. heel touch crunches, a.k.a. toe tap crunches) correctly. This variation targets the oblique abs. Start in the crunch position, shoulder blades off the floor. Move from one side to the other, using your right hand to touch your right shoe, then your left hand to touch your left shoe. Your upper body should move towards the side along with each arm.