Davina McCall has admitted that preparing for her gruelling Sport Relief challenge took its toll on her marriage.
The TV presenter and mother-of-three completed a 500-mile Edinburgh to London trek last month, which raised almost £1 million for charity but was so tough that at one point she had to be hauled out of Lake Windermere.
She told The Sun that the exhausting trek, which saw her run, swim and cycle despite horrendous weather, put a strain on her marriage to businessman Matthew Robertson.
Davina, 46, said: "We just had a really difficult six months. Matthew's dad was ill and I was doing the challenge and he had hurt his shoulder.
"We were not arguing but it had been tough for the both of us. We both had been in a kind of tough place but now we are here, we have been on holiday."
She added: "Getting though stuff like that makes the next step better ... You always have to think when you are in a relationship that if you have a tough six months then that is nothing in the scheme of things.
"When you are in your 20s and you have a tough six months then that is a break-up. When you are married, it is nothing."
Davina said that she had recovered from the challenge, but her knees were "a little bit iffy" and that she wanted to "grow old disgracefully".
The trek features in a special BBC One show, Davina: Beyond Breaking Point, at 9pm tonight (March 20).