Step 3: Reach the right hand out to the side ... Some of the most effective ab workouts are the plank, mountain climbers, roll up, and bicycles.

Many ab wheels are built with coil springs to add resistance or help control the rollback, but the barbell is heavier and harder to roll out for many people. For others, a wider bar is easier to ...

or to roll one arm out at a time for a strengthening exercise. When using them both at the same time, they target the same muscles as a traditional ab roller. Additionally, you can use one at a ...

While the bicycle crunch came out on top for RA activation ... I can perform 12 controlled sit-ups, no sweat, but a few sets of 12 ab roll-outs in my recent workout left my mid-body muscles ...