fun and games

[...] Dr. Charles Schaefer, of Fairleigh Dickinson University, said he’s not surprised that laughing yoga has caught on. He studied similar laughter and found that people who laughed heartily, for no reason and for just one minute, had a significant increase in mood. “I don’t think the body cares what the stimulus is, as long as you do that with hearty laughter,” Dr. Schaefer said.