Your hands should be on the sides of your head.

The move: Lie on the floor with your knees bent 90 degrees and your feet planted your partner should mirror you, with both your feet in the air, each sole touching the corresponding foot of your partner (i.e., right foot to left foot and left foot to right).

Here, Aaron Viscounte, CSCS, PN1, head coach and manager at Summer’s Fitness in North Canton, Ohio, kicks the bicycle up a notch by adding a partner component.

Two decades ago, the American Council on Exercise tested numerous abdominal moves using electromyography equipment to measure muscle stimulation - and the bicycle came out on top. Our response to that is, Why not have a training partner for abs? Grabbing a friend or significant other to train your core with will give your efforts a boost, turning what can sometimes be a boring undertaking into an amazing higher-intensity (and dare we say enjoyable) abdominal routine. We’ll do bench presses, seated presses, squats and even curls with someone in tow who can give a spot and motivate us past sticking points - but then we take our mat and tuck off to a corner by ourselves to pump out sets of crunches, leg lifts and planks. Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members!Ībdominal training tends to be a lonely endeavor.

Download fun ab workouts