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An 81-year-old from Somerset who runs more than 50 miles (80km) a week has been selected to run Swansea Half Marathon for England.
Peter Madelaine, from Wedmore, started running cross country at the age of 11 after struggling with his grades while at boarding school in Snowdonia.
The retired astrophysicist, who is a member of Mensa, was later diagnosed with attention deficit hyperactivity disorder (ADHD) and autism in his 60s.
He said he running brought him a "new kind of freedom" as a child – and he has stuck with it ever since
Mr Madelaine said he wants to break the stereotype that "if you're 80, you're bent over with a stick in a pub".
"It's rubbish," he added. "I don't feel like my age, my brain still ticks over fine."