At some point, every halfway-decent shopper has had to take a moment or two out of a wild buying spree to kick off her heels and rub her calves for a moment. It's why there's a Mrs. Field's at every mall. Well, a new study commissioned by Debenhams (sort of the Macy's of England) demonstrates that, just like an offensive lineman heading to the bench for some Gatorade, you're taking a minute out in Pinkberry because you've been burning calories like a furnace. More rigorous than normal activity (or browsing Gilt), shopping eats up five calories every minute you rifle through the discount bin — for the average woman, that's 48,000 calories a year. To put that in more visceral terms, that's over 260 Luna Bars for every year you spend trudging from store to store, sharp-cornered boutique bags bumping into your legs. Kind of makes you wonder whether you should take the cash you spent on your Crunch membership and invest it in sample sales.