Originally Posted by andrewuza
Swimming does work, and is very good for toning up. But to lose weight you have to really exert yourself, you can't do the gentle, slow up and down that you see some of the more mature swimmers doing.
You have to get to the point where you're breathless.
I second this opinion. Swimming is great and very healthy and beneficial but it's more about toning and shaping up than losing weight. It shouldn't be the only thing you do if you expect stunning results. Also: the diet or change of your eating style - that is the key.