 Laugh it out and slap your thighs and go around laughing. There's a new kind of exercise that's helping people become healthy and happy. Laughter Yoga. It started with just five people at a park in Mumbai, India. Now it has turned into a global health movement that has spread throughout 72 different countries. Have a deep breath. In 2009, Bill and Linda Heymaker started their own laughter club called Let's Laugh Today. We like to help people get their giggle on so that they can be joyful and the world can be more joyful. I think it's a good way to introduce people into breathing techniques because I think there is a lot of benefit to yoga and breathing. And she's right. Clinical research has shown a 6% reduction in blood pressure and a 28% drop in the stress hormone cortisol. It sounds silly but we lead you into it slowly so that by the time you get into the middle you'll be laughing happily with everybody. Let's Laugh Today isn't the only one interested in this unusual new kind of exercise. In fact, Massachusetts General Hospital and Northeastern University both are offering Laugh Yoga workshops to give you a chance to find out what this humorous health movement is all about. That's telling people on Monday at work that you were sent to pee today. For BU News Service, this is Iris Moore.