Neurologist Henri Rubenstein found that one minute of
solid laughter provides up to 45 minutes of subsequent relaxation.
Professor William Fry at Stanford University reported
that 100 laughs will give your body an aerobic workout equal
to that of a ten-minute session on a rowing machine.
Medically speaking, this is why a damn good laugh is damn good
The older we become, the more serious we become
about life. An adult laughs an average of 15 times a day;
a preschooler laughs an average of 400 times.
(taken from a FB status from The Hippies were Right)