Urban Rebounder

The claim

"Sculpts your entire body," says the video for this mini-trampoline. "In just 10 minutes a day, you'll build lean ripped muscle and develop a tight sexy body." The Rebounder and six workouts on a DVD cost $90 at www.urbanrebounding.com.

The check

We used a metabolic gas analyzer to record calories burned during the workouts included with the device when we tested it in 2007. And we had staffers use the device on their own.

Bottom line

Keep bouncing. It takes more than 10 minutes to burn lots of calories. Time to lose 1 pound of fat: seven weeks, if you use it for 15 minutes three times a week. About half of the staffers who tried the Rebounder said they'd consider buying it.