Video: Can a wrist band help make you healthier?

Gadget of the week: the Fitbit flex

It tracks your sleep, records your steps, and counts your calories - the smartwatch revolution continues. Ciara O' Brien puts the Fitbit Flex to the test.

The Fitbit flex is the latest gadget that wants to help you live a healthier life, monitoring your movement, activity and even your sleep.

We have put it to the test.

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