If you're only working those front ‘six-pack’ ab muscles — aka your rectus abdominis — you’re missing out on strengthening your entire core. We’re all guilty of training the front of the body, but ...

(CNN) — If you want a resilient core, strengthening your six-pack is just the start. Your obliques — the muscles that run along the sides of your waist — may not get the same attention as your ...

(CNN) — If you want a resilient core, strengthening your six-pack is just the start. Your obliques — the muscles that run along the sides of your waist — may not get the same attention as your ...