The twisting floor crunch works the abs and obliques. Position a maton the floor and lie down on the mat flat on your back.

Pull your left leg up until your knee joint is at around 90 degrees.

Now take your right leg and rest your ankle on your left knee.

Start the exercise by touching the side of your head with your fingertips and raising your shoulder blades slightly off the mat.

Crunch up, bringing your left elbow up to your right knee.

Slowly lower back to starting position without letting your shoulder blades touch the floor.

Repeat set for the opposite side of the body.

Exercise Tips:

Never let your shoulder blades touchthe floor throughout the set.

Try to bring your elbow up as high as possible using your abs only (no swinging!).