Running non-stop for 16 hours through the summer heat, a man will put his stamina to the test when he takes part in a 100km race to raise money for three charities.

Tyler Carew, of Ashley Drive, Borehamwood, will take part in Race to the Stones 100km race to support Get Connected, Alzheimer’s Research UK and Cancer Research UK.

The 23-year-old chose the charities in memory of his grandparents – his grandmother, Heather Carew, died in 2004 of cancer and his grandfather had dementia.

After the death of his grandfather in 2010 he began volunteering at the Alzheimer's Society in Kentish Town.

Mr Carew, an assistant manager at PC World, said: “My grandmother had cancer when I was quite young and since then, various other family members have been diagnosed with the disease.

“My grandfather Ken had Alzheimer’s and I helped look after him for six years.

“Since then I have been volunteering at a respite centre in Camden. It’s really cool and good to help out families going through what I had gone through.

“You’ve learnt coping mechanisms that you can share with and help them.

“It’s good volunteering and I enjoy it but it’s only support-based. The money I will raise will go towards prevention and care.”

Mr Carew has set himself a target of £500, and has already raised more than £400.

He also hopes to run the race in fancy dress – and is open to suggestions on what to wear.

The race will take him along one of the oldest routes in the country, starting in Oxford and finishing at Europe's largest stone circle in Avebury.

The gruelling race can be split into two-day stints, but Mr Carew has taken on the tougher challenge of running the entire distance in one go.

Mr Carew had only ever ran 100m before he began training for the race. In preparation, has even given up alcohol and spends every day after work in the gym.

He added: “Almost everyone else I know is doing it in two days.

“Pushing myself through the pain barrier when my legs are telling me that I’ve had enough is going to be the hardest part.

“Massive fatigue and cramp - everything else I can manage and keep going but cramp will be the hardest part.”

Race to the Stones is run in aid of Get Connected, an advice service for young people aged under 25. It is sponsored by Dixons Carphone, which has sponsored Mr Carew £250. 

For information, visit www.racetothestones.com