Work out with the Android CardioTrainer app

Now you can burn off those guilty carbs with your own personal trainer, while never missing another call.

T-Mobile is currently offering the ultimate get-fit smartphone package, bundling the Sony Ericsson Xperia X8 with the CardioTrainer app, available on the Android 2.1 operating system, along with an arm strap for training on the go.

The app's voice notifications feedback about your distance, time, pace and calories burned. And it features GPS tracking and music integration so you can listen to your favourite workout mix using the Xperia’s MP3 player.

For an additional fee, you can also add an extra feature that allows you to set up and follow your own weight loss plan to turn those keep-fit resolutions into reality.

As well as the workout app, the Xperia X8 comes with a 3.2-megapixel camera, expandable memory up to 16GB and 3in LCD touchscreen with 320x480-pixel resolution.

T-Mobile is offering the workout bundle with the Xperia X8 on a two-year contract that includes 300 free minutes, 500MB internet allowance and unlimited texts from £15.32 per month, which of course – thanks to the merger that created Everything Everywhere – means you can use Orange’s signal too.