Running the 5K Race for Life without stopping was a real achievement for grandmother-of-five Nina Barrett.
But she will need all her strength as she takes on 26 miles.
Thankfully, the 54-year-old, who had never run until two years ago, will have someone motivating her to the finish line.
Her personal trainer Darin Melville, 42, wearing a Superman costume, will be running alongside her.
‘This is the big one so I have just got to go for it,’ says Nina, 54, a book keeper of Hazleton Way, Horndean.
‘Everyone wants to do the London Marathon – it’s the one to have, the ultimate.’
Nina took up running two years ago as she wanted to do the Race for Life.
But she quickly realised she was nowhere near fit enough.
‘I realised I couldn’t run because I was huffing and puffing,’ she says.
‘That’s when I got a personal trainer.’
Darin, 42, who works at Roko gym in Copnor, has helped to transform Nina’s stamina in a relatively short time.
Training for five nights a week – and doing pilates on her ‘day off’ – she has prepared by completing the New Forest, Gosport and Portsmouth coastal half marathons.
Darin, of Westways, Farlington, says: ‘She will finish it. It’s just a question of how long it’s going to take her.
‘There will be no picking up, no carrying.
‘She’s got to do it all on her own.
‘For someone like Nina, in her 50s and only running for two years, I think this is quite massive.
‘I don’t know if she realises what she’s actually done – she’s done really well.’
The pair will be raising money for BRACE, a charity that focuses on financing research into dementia, especially Alzheimer’s disease.