Cardio Workout Extraordinaire

So I'm recovering from some health problems (nothing major, not to worry, Raincoast Readers), and my doctor gave me a list of "approved exercise activities."

Halfway down the list:

"Healthy, vigorous sex (monogamous)"

Snort.

Funny, but the Y doesn't have that slotted in between Urban Gladiator and Dancefit.  Too bad.