Kevin Sinfield left humbled by £1.3m raised for Rob Burrow and MND Association as he completes seventh marathon in a week

On Monday, the Rhinos legend completed his final of seven marathons in as many days in support of Burrow who was diagnosed with MND last December.

Sinfield had set an initial goal of £77,777. It passed the £500,000 mark on Saturday as he was greeted by Burrow and his family as he finished his fifth marathon.

As he was completing his final run on Monday morning, the fund-raising hit the seven-figure mark and has continued to climb at an exponential rate.

Over 50,000 people have made a contribution and Sinfield hopes the amount of money will make a "huge difference" to people and their families suffering from MND.

"It has been rough but a brilliant week," said Sinfield.

"I am massively surprised and blown away by the support. When we set out on Tuesday morning for the first one we were at about £40,000.

"We set the target of £77,777 and we were a little bit concerned we may not hit it but suddenly it started to roll in. The support has been incredible.

"Rob has felt it, I spoke to him on Saturday when I was lucky enough to see him. His family are completely overwhelmed.

"We have been really proud to wear the vest with number seven on it and what that represents for Rob and his family.

"We are proud to have the MND Association on the front as well. To run in their colours and understand the work they do and the difference they make to so many families across the UK.

"This week I have heard so many stories about how horrific this disease is. I know how cruel it is and I have seen it first hand with Rob over the last 11 months.

"This amount of money will make a huge difference. It will change a lot of things hopefully and the awareness is crucial.

"We need to find a cure."

Sinfield has vowed to continue the fight against MND. He won everything there was to win on a rugby league field but admitted the past week was the most special he has experienced.

He continued: "This isn't the end. This won't stop.

"Certainly there is a connection with MND now. The MND Association has been wonderful.

"What is next, I don't know. We are all going to miss this tomorrow morning and it has probably been the most special week in my life."

It is hard to imagine the exhaustion Sinfield was feeling at times during his gruelling challenge but his dear friend Burrow was always in his thoughts, spurring him on to continue.

He said: "He has been in my thoughts for all seven marathons. We wanted to do him proud, the whole team did.

"It was a crazy idea, I text a few people and asked if they fancied it and straightaway they all said yes.

"You can't be anything other than full of admiration for Rob for how he has handled the last 11 months.

"There are so many families across the UK, and the world, who have just been ripped apart having to face this savage disease.

"We have got to do something about it."

Sinfield was supported by fellow Leeds legends Jamie Peacock and Jamie Jones-Buchanan at different points throughout the week, as well as current Rhinos captain Luke Gale

"For this I have been really upbeat, the team has been incredible," he continued.

"We have had a couple of inspirational runners alongside us. Jamie Jones and Jamie Peacock have been fantastic.

"Luke Gale ran 5km with me and it is so fitting that our current number seven and our captain has put the vest on to respect Rob like he did."

Sinfield is affectionately known as 'Sir Kev' by Leeds Rhinos fans and when asked if he feels that would become more than a nickname following his heroic efforts, he reaffirmed it was not about him.

"It isn't about that for me. The support has been incredible and this has been about Rob," he added.

"This about a group of friends and teammates who had some wonderful times together, one of them has hit a rough patch and we are coming out to help.

"The big message from me is that sometimes you just need to help a mate and that is all we are trying to do."

To donate, visit: https://www.justgiving.com/crowdfunding/sinfield-7-in-7