I've actually done this over the summer and defiantly seen a lot more definition to my abs. They weren't bad before (esp aft the two kiddies) but looking really toned. Summer Abs Challenge | Fitness Republic
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.