Business of running, who is cashing in?
Simon Browning joins Sophie Raworth and 150 other runners on a frozen weekend park run
Karen Weir who owns 'Run with Karen'
A running school in London
Sophie Raworth and You & Yours reporter Simon Browning
Struggling for breath just across the finish line after the 5km time trial
BBC newsreader Sophie Raworth "addicted to running"
With Jackie Millet, started running at 57 and has done 14 marathons in 3 years
Gary and his brother
They've lost 20 stone between them through their dedication to running, all in cheap kit
AJ, Oliver and Paola - Runners on Saturday morning
Regulars to the Park Run
This gallery is from
The hidden harm caused by hip implants, and the smartphone apps killing your battery.
First broadcast: 25 Feb 2013