Progress Update: Okay, last week I was a total superwoman. I worked out everyday at the gym, lifted weights, did the stairmaster, ran for miles on the hamster wheel, until my knees finally reminded me that I’m no spring chicken. “Hey,” my knees protested, “Just who do you think you are? A spring chicken?” So, in the interests of keeping my knees happy, I’ve toned it back a little this week. That’s a good excuse, isn’t it? (What about eating handfuls of greasy potato chips? Is there an excuse for