1. Grab a mat and lay down flat on your back. Place your hands gently on your temples and lift your legs so that you have a 90-degree angle at both your hips and knees. Crunch your abs so that you lift your shoulders up from the mat and you are ready to go. This will be your starting position.
2. To initiate the movement, you need to simultaneously, bring your right knee up and in towards your body whilst crunching your left shoulder over towards it (exhale as you do this). As you do this extend your left leg to create space for your left elbow.
3. Gently inhale and return to the original position. Very briefly pause here and repeat for the opposite side. So exhale and bring your left knee up and in towards your torso whilst crunching your right shoulder over towards it, extending your right leg as you go.
4. Continue alternating in this manner until you complete the recommended amount of repetitions.
Variation: V Sit With Plate Rotation or Kneeling Oblique Cable Crunches.
Bicycle Crunches, Ab Bike