Chris Hoy shares heartbreaking cancer update as he reveals tumour spread and fractured his spine

He revealed he had terminal cancer last year

Hoy revealed last year that doctors had told him he has between two and four years to live.

"So I had injections. They drill into your vertebrae, squirt this cement material in and it sets, fuses and makes the vertebrae as good as new again. So I'm back to lifting weights again. As soon as you're told this has been taken away, you suddenly appreciate everything, the basic things.

"It's like losing your wallet, when you find it, you're not in a net gain situation but you're so grateful for it. The thought of not being able to pick up your child, the thought of that not being a possibility was horrendous. And then for now I'm doing OK."

Over the last few months Hoy has explained that his goal now is to spread awareness.

He told Sky Sports back in December: "For me, my purpose is spreading awareness about it, trying to get men to go and get checked. It's a very simple thing to deal with if you catch it early enough.

"I realise how far I've come now. There's no way I could have sat here talking to you six months ago. I would have been a gibbering wreck. The overall hope was that it would help people, not just people going through a cancer diagnosis. But that you can get through the most extreme situations and pop out the other end, whilst you still have hope and are able to live your life."

Speaking at the time of his diagnosis, Hoy said: "As unnatural as it feels, this is nature.

"You know, we were all born and we all die, and this is just part of the process.

"You remind yourself, aren't I lucky that there is medicine I can take that will fend this off for as long as possible."

Hoy won six Olympic golds between 2004 and 2012 and is the third most decorated British Olympian of all time.