大象传媒

Wearable technology is enjoying a boom - a whole range of fitness tracking bracelets, cut-price touchscreen smartwatches and strap-on heart rate monitors are available.

There is even a gadget you wear on your wrist which claims to measure how many calories you are eating.

The 大象传媒's North America technology correspondent Richard Taylor put some of the devices to the test at this year's Consumer Electronics Show (CES) in Las Vegas including a chair to help you relax after a hard exercise session.