A daily chuckle can burn up to five pounds of fat a year, scientists have found. A really raucous laugh uses about the same energy as walking more than half a mile, the American researchers claim. It works many muscles and makes the heart beat faster.

A 15 minutes of chuckling daily could lead to a weight loss of just over 4.5lb in a year. Although laughter has long thought to be good for the heart and the immune system. This is the first study to suggest a benefit in weight loss.

this has been mentioned long before a "scientific study" ... did we need a scientific study to tell us that running uses muscle and burns calories??? i don't think so ... after you finish laughing so hard you cry, why else does your stomach hurt ... YOU USED YOUR AB MUSCLES ... you can feel 'em contract while laughing ...

i wish that I could lose 5lbs from laughing with my belly - how cool would that be - i laugh so much with my son he is a riot and we are always laughing and lose weight