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Let your smartphone burn calories for you.


Want to get your bulging butt a bit more fit this New Year? Then reach for your smartphone, not the dumbbells.

A recent study in the Archives of Internal Medicine found that "the addition of a personal digital assistant and telephone coaching can enhance short-term weight loss in combination with an existing system of care."

The yearlong study tracked 70 overweight adults—one group was given a mobile device to log their daily calories and workouts, and the other was given pen and paper. Participants who used the app lost around 9-15 pounds, while the pen and paper crew barely lost any weight.

One app that will nudge you toward fit-town is Fitbit. The free iPhone and Android app lets you log your food and water intake, workouts and weight from your smartphone. But unlike other diet apps, Fitbit offers additional techie devices you can purchase to help you reach your goals.

The Fitbit Zip Wireless Activity Tracker ($59.95) tracks steps, distance and calories burned each day and syncs those stats to your smartphone. The tracker also allows you to "set goals, challenge friends and go farther--one step at time."

Fitbit also offers the Aria Wi-Fi Smart Scale ($129.95), which "taps into your home wireless network to upload your information to your private account automatically each time you step on the scale."