Enthusiasm

A study at the Biomechanics Lab at San Diego State University looked at a variety of common abdominal exercises in order to determine what really works. The study compared 13 abdominal exercises, ranging from the traditional crunch to more complicated activities, using at-home and gym equipment. The top exercise was:

Bicycle maneuver
Lie flat on the floor with your lower back pressed to the ground. Put your hands beside your head. Bring your knees up to about a 45-degree angle and slowly go through a bicycle pedal motion. Touch your left elbow to your right knee, then your right elbow to your left knee. Breath evenly throughout the exercise.