A NEW TV documentary is to go behind the scenes of the gruelling challenges a Leeds Rhinos legend endured to raise funds for those battling motor neurone disease (MND), including ex-teammate Rob Burrow and Bradford City legend Stephen Darby.

The BBC Breakfast team has been following former rugby league player Kevin Sinfield since day one of his mammoth charitable efforts that have raised millions.

Read: Kevin Sinfield's 'Ultra 7 in 7' film premiere in Leeds

The documentary will show never seen before footage of each of his challenges, and an exclusive first chat with him after getting his new role in the England coaching team, as well as more intimate moments as he ran through towns and cities across the UK, including Bradford.

Kevin’s journey began in 2020, when he ‘just went for a run for a mate’, to support MND charities and raise awareness of people living with the disease.

He started by running seven marathons in seven days but continued to push himself through more physical challenges.

In 2022, Sinfield completed ‘The Ultra 7 in 7’ challenge, running seven ultra-marathons, covering around 40 miles a day.

He ended day six of the challenge with a hero’s welcome at Valley Parade.

As the 42-year-old entered the ground, he hugged former City captain Darby, who was diagnosed with MND in 2018.

Finishing at Old Trafford in the Men’s Rugby League World Cup Final, Sinfield raised more than £7 million.

Sinfield said: “When we set out on the first challenge back in December 2020, we just wanted to help a friend who had found himself in the toughest imaginable position.

“What started out as a way to help a friend became so much more over the course of those first seven marathons in seven days and has grown incredibly over the subsequent two challenges of the Extra Mile and the Ultra 7 in 7.

"I think everyone can imagine what they would do for their friend in the same position and the overwhelming support has shown that we are a nation that cares about people who are facing their own adversity.

“I am proud to be part of the MND community, the people who are living with the impact of MND who I have been privileged to meet since 2020 inspire me every day and we will never stop banging the drum for MND until we find a cure.”

Watch Kevin Sinfield: Going the Extra Mile on BBC Two and BBC iPlayer on Friday, February 3, at 7pm.