Instead of Treadmill Trotting (679 calories at a pace of 10 minutes per mile)...
Try Pogo Running (800 calories*)
Kangoo Jumps shoes look like moon boots on top of collapsible hoops, and their spring is intended to make you feel like you're running in zero gravity (or at least little gravity). The company says that the shoes protect your joints by reducing ground impact by up to 80 percent and also claims that you can burn 30 to 40 percent more calories than you would by running normally. A Rollerblade-ish fad? Maybe. But that shouldn't matter to treadmill joggers who like the way the rubberized belt cushions each step but hate how running in place makes them feel like a sad hamster. (Kangoo-Jumps.com, from $229)
*Possibly as much as 800 calories, if you can keep up a good pace for an hour