Here is some information from Self Magazine
50% is the percentage by which your blood vessels can widen when you're laughing, compared to when you're stressed. To get that same heart-healthy benefit, you'd have to either get a prescription for cholesterol-lowering drugs or bank up to 10 full minutes of cardio for every minute of laughter. "We believe that laughter actually protects against heart disease," says study author Michael Miller, MD., professor of medicine at the University of Maryland.
Laughter increases gamma brain waves, the same ones activated during meditation, to make you feel focused and alert but also calm.
A funny trick for flat abs? Laughter yoga, which combines yogic breathing with giggles, activates your internal obliques 150 percent more than crunches do.
1 sugar free fudge pop. Roughly what you burn off if you laugh for 15 minutes straight.
A good laugh is equal to 10 minutes on a rowing machine.
Add laughter to your daily exercise routine.