1. Garmin vivofit
Price: £99.99 (plus £49.99 forheart rate monitor)
Garmin's GPS business has lost its way recently thanks to free or low-cost smartphone navigation apps. With vivofit, the company is wisely expanding its sports gadget line. Vivofit is a wrist-worn fitness tracker available in five colors. Batteries that last about a year are one differentiator. Also, the device learns your current activity level, then nudges you to up your game by assigning you ever-increasing (though realistic) daily goals. Meet a milestone, and vivofit increases the next day's goal. Sit too long at your desk, and the gadget displays a red bar that continues to grow until you get moving again. Walking for a few minutes will get you out of the red.