Health researchers in Lancashire have designed a new "super" trainer, containing miniaturised bed springs.
A team at the University of Central Lancashire worked with a mattress manufacturer to shrink the mattress supports into the soles, to try to reduce running-related injuries.
"If you had a car suspension with just a damper and no spring in it then you'd have a very bumpy ride. Therefore having a shoe that incorporates both provides a much improved shock-absorbing system compared with existing technology," says UCLAN's Professor Jim Richards.
"We will also be able to tweak the arrangement for each individual runner", he says, "which is particularly important because everyone has a different running style and physiology that impacts on their risk of different types of injury."
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Showers or longer spells of rain. Severe gales on Sunday with storm force winds for coasts and hills
Tyson Fury plans to give his fans a song when he's finished with world heavyweight champion Wladimir Klitschko on Saturday night.
Often very windy, especially as we head into Sunday, with rain or showers. Met Office 'Be Aware' warnings have been issued