First off, it's easy to sit back while doing this move, letting your hip flexors do much of the work. Second, if you keep a flat back, it limits the degree to which you can hit the upper abdominals—your back has to round! And finally, your hands should stay in the same relative position next to your head for the duration of the set. Letting them drift away on the eccentric and then pulling them back again beside your head brings a lot of shoulder and upper body into the move.
Bicycle: This exercise works your obliques as well as your rectus abdominis. Lie on your back, hips and knees bent at 90-degrees, chest curled over ribs, hands behind your head. Extend the left leg out while bringing the right knee in towards the chest and rotating the left shoulder toward the right knee. Keep the arm from crossing the face. Rotate from the trunk through the center to the other side without dropping your chest. Move in slow, controlled movements without shifting your hips.
But alas, this process doesn’t happen overnight. And by now, the washboard abs industrial complex has produced such a dizzying volume of exercises, tricks, and gizmos promising to transform your midsection into a Hemsworth brother’s midsection that even after you’ve settled on a strategy, it’s hard not to wonder whether all that diligence and discipline is really making a difference.
If it was possible for the experienced bodybuilders to build muscle without gaining fat or, better, build muscle and lose fat at the same time then they would do it in a heartbeat. Who wants to go through the ordeal of bulking and cutting when it’s possible to build muscle and burn fat at the same time? The answer is hidden in the muscle growth rate. Muscle growth follows a logarithmic pattern (rather than a linear pattern), which means that muscular gains come quickly in the beginning but they decrease over time.
To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.