If you want a sleek, toned midsection, crunches will only get you so far. Truly strengthening the core requires exercises that recruit all layers of your abs, including the rectus abdominis, obliques, and transverse abdominis.

If these terms have you scratching your head in confusion, don’t worry! You need a routine that works these midsection muscles from multiple angles. Targeted exercises reveal super sexy abs and a flattering tummy.