Davina McCall to test endurance 'Beyond Breaking Point'

Davina McCall has been in training for the seven day challenge

Davina McCall will embark on an extreme endurance challenge for Sport Relief, attempting to run, swim and cycle 500 miles from Edinburgh to London.

The TV presenter will have seven days to complete the Beyond Breaking Point challenge next month.

On day one, she will tackle a 130-mile cycle, equivalent to some of the longest stages on the Tour de France.

Famous female friends will join her on the route, raising money to help women around the world.

"When I first started training for this challenge, I cried every day for a fortnight. My body's not built for an endurance challenge of this scale, and I'm absolutely terrified of open water and I can't run!" admitted McCall.

She will swim the life-threateningly cold Windermere and scale Scafell Pike on foot, before finishing with a full-distance marathon run into London.

"No matter how tough it gets, I just keep thinking it's nothing compared to the struggles the women I've met in Kenya have to live through," continued McCall.

"Thinking of them will be the thing that keeps me going when things get tough, and I know every penny I raise will really make such a massive difference to people's lives. I'm doing this for the girls," she added.

Other Sport Relief challenges have included 2009's climb up Mount Kilimanjaro - Africa's tallest mountain, by celebrities such as Cheryl Cole, Fearne Cotton, Gary Barlow and Chris Moyles, and David Walliams' River Thames swim.

McCall will also swim Windermere, where survival times at this time of year are just 30 minutes

McCall, 46, has taken part in several events, including a celebrity bike ride from John O'Groats to Lands End with Walliams, Jimmy Carr, Miranda Hart and John Bishop.

She will start her challenge in Edinburgh on 8 February, arriving in London on Friday 14 February.

The presenter is expected to spend more than 47 hours pedalling and will burn more than 10,000 calories a day on the way to London.

It will all be captured on film for a BBC documentary, which will be broadcast in the run up to Sport Relief Weekend, between 21 and 23 March.