In the world of laughter yoga, the answer is “not much”:
This weekend, Manchester will host the 3rd annual U.K. National Laughter Festival. Madan Kataria will be the keynote speaker. Kataria (colloquially known as the Guru of Giggling) is the creator of Laughter Yoga. Created in 1995, the practice is a combination of yogic breathing (pranayama), and voluntary laughter.
Purely laughter though – no jokes, humor, or comedy. The idea is that your brain doesn’t register the difference between fake and real laughter, and it produces the same endorphins regardless, resulting in enhanced well-being. Kataria claims that laughter “helps you to unwind the negative effects of stress, and also boosts your immune system.”