- The Bicycle Crunch Exercise was the best for strengthening the rectus abdominis
- The Captain's Chair Exercise the best for strengthening the internal obliques and the external obliques
However, it's important to keep in mind that there is no single abdominal exercise that challenges all the abdominal muscles in the most effective way, and the best way to work the abs is with a variety of abdominal exercises as explained in the next FAQ.
