I am an avid hiker and generally try to stay active. The trouble is; I really like pizza. About a month ago it finally dawned on me that hiking just wasn’t enough. If I’m going to eat pizza for dinner on Tuesday and Saturday, then I need to join a fitness center where I can climb onto an elliptical on Monday and Wednesday evenings, and also Sunday morning.

So the last several weeks I’ve been going to the gym where I’ll spend a half hour on an elliptical. I don’t mess around, I go...