3/4 Sit-Up vs Air Bike

Lie down on the floor and secure your feet. Your legs should be bent at the knees.

Place your hands behind or to the side of your head. You will begin with your back on the ground. This will be your starting position.

Flex your hips and spine to raise your torso toward your knees.

At the top of the contraction your torso should be perpendicular to the ground. Reverse the motion, going only ¾ of the way down.

Repeat for the recommended amount of repetitions.

Lie flat on the floor with your lower back pressed to the ground. For this exercise, you will need to put your hands beside your head. Be careful however to not strain with the neck as you perform it. Now lift your shoulders into the crunch position.

Bring knees up to where they are perpendicular to the floor, with your lower legs parallel to the floor. This will be your starting position.

Now simultaneously, slowly go through a cycle pedal motion kicking forward with the right leg and bringing in the knee of the left leg. Bring your right elbow close to your left knee by crunching to the side, as you breathe out.

Go back to the initial position as you breathe in.

Crunch to the opposite side as you cycle your legs and bring closer your left elbow to your right knee and exhale.

Continue alternating in this manner until all of the recommended repetitions for each side have been completed.