Double Olympic rowing champion Heather Stanning will join thousands of runners this weekend when she takes part in the London Marathon.
Major Stanning, who serves with the Royal Artillery, is tackling the 26.2-mile course to help raise funds for military charity Royal British Legion Industries.
But she describes how years of racing in a rowing boat have made the switch from oars to running shoes a lot harder than she anticipated - and on her knees in particular.
Heather is raising money for Royal British Legion Industries (RBLI).
The charity provides employability, training and support to the Armed Forces community and they run a package called LifeWorks which aims to help veterans who are struggling to find employment having left the military.
You can support Heather at http://uk.virginmoneygiving.com/fundraiser-web/fundraiser/showFundraise…