Suunto, the company that makes sports watches which monitor your heart rate and speed while jogging, has announced the limited availability of its Foot POD units in red and yellow.

The devices, which clamp on to your shoes and measure how far you've run, have previously only been obtainable in boring black.

The Foot POD differs from traditional pedometers because it's able to more accurately measure distance and speed if stride length varies.

This apparently is useful as many "serious" runners alter their running style depending on how tired they are, the surface they're running on and the weather conditions.

The new, brightly coloured, Foot PODs will start showing up in shops late this summer, and will cost £70.