my dance teacher used to make us do this! Exercise for the Transversus Abdominis (AKA the muscle that pulls in the ring of your waist) One area of your abs you may be neglecting is the transversus abdominus - without working it, you run the risk of developing a square torso (straight up and down) rather than an hourglass one (tapered at the waist).
someone said: 30-day ab challenge. I just had to repin this because I've been doing it for only 4 days now (and at only 10 reps instead of 25) and already I'm seeing definition. And I've tried pretty much every Ab workout on pintrest and haven't seen these kind of results.