Borlée arctic trek

An 80 km trek across an Icelandic glacier, climbing to 1,300 m as temperatures drop to -15°C.

This is not the most obvious exercise for top class sprinters who do most of their training on the running track. However, for nine athletes from Belgium this is a chance to impress.

Coach Jacques Borlée will choose which runners make the 4x400m relay team for London 2012 and among the hopefuls are his sons - identical twins Kevin and Jonathan Borlée.

READ MORE: Olympic twins endure Arctic trek

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