A "fit and healthy" university lecturer suddenly collapsed and died following a gym work out, Birmingham's coroner was told.
It was later discovered that Phillip Newbury, aged 29, who lectured in English as a Foreign Language at Aston University, had an undiagnosed heart condition.
Narinder Dale told the inquest Mr Newbury had been lodging at his home in Narrow Lane, Halesowen, for about three months and would work out every day for about an hour at a gym he had in his garage.
He said he had made some tea but when he went to call Mr Newbury he found him slumped on the garage floor.
Consultant pathologist Dr Adrian Warfield said Mr Newbury's heart had become massively enlarged and had been struggling to circulate blood because of a condition called dilated cardiomyopathy.
He said it was a condition which could be found in otherwise fit and healthy people and at the time Mr Newbury collapsed his heart was probably at its limit.
Susan Newbury said her son, who was also doing a PhD, used to lift weights, play football, walk a lot and ride his bike.
"He was a normal 29-year-old who had no problems at all," she said.
Coroner Aidan Cotter recorded that Mr Newbury died as a result of natural causes.
Afterwards Mrs Newbury paid tribute to her son, saying that a scholarship had been set up in his name at Aston University.
She said: "He was just perfect. He was a young man who enjoyed life and had a passion for the subjects he was researching. He was a good friend to everybody."
Mr Dale added: "Nobody had a bad word to say about him. He was quite a big bloke because of his body building, like a gentle giant."