Richard Whitehead is running 40 marathons in 40 days in memory of his friend Simon Mellows, who died in 2005 after contracting a secondary cancer, and as a tribute to Terry Fox who died, aged 22, in June 1981.
He was an amputee and sarcoma cancer sufferer who died as he tried to run across Canada to raise money for cancer research. He never completed his challenge.
Unfortunately Terry got secondary sarcoma and died on his journey - that set a seed in my head to say that sport is not just about winning it is about the kind of impact you can have. It is about the legacy.
Terry Fox had a massive impact on my perceptions of life and where sport really sits.
For him, it was to raise one Canadian dollar for every person who saw him and he has raised over 400 million Canadian dollars - it is a lot of money towards trying to eradicate cancer in the world. If I had 1% of the impact he has had, it would be amazing.
- Donate to Richard's run here.
More top news
Rain for the northwest, dry and cold elsewhere
Rejecting a showdown with Ed Miliband, David Cameron's terms sent to broadcasters reveal his deep dissatisfaction with the debate proposals.
The owners of what some people claim to be the 'Welsh Holy Grail' are offering a cash reward for the ancient artefact's safe return.