Yep, planks are better than crunches. It turns out that crunches are bad for the spine. Also, planks do work ALL the muscles in your core. Neither sits nor planks will remove fat from your stomach.
Working your core is fine as a part of a whole body regimen.It would be a bit strange to ONLY do ab exercises though. You'd lose more belly fat doing tons of bodyweight squats than doing sit ups. Look into weight training or yoga, if you're interested in strengthening your muscles.
"Losing weight is easy; I've done it dozens of times."
(with apologies to Mark Twain).
Ultimate goal: Size 10 clothing.
Last edited by DietVet; 07-08-2012 at 02:49 AM.