Donald Trump tells Dr Oz he feels as good as he did at 30

Republican candidate claims he stays fit on the campaign trail through his vigorous speaking style and reveals doctor's letter

Donald Trump has told Dr Oz, a TV physician, that he feels as good as he did at the age of 30, in a long-awaited discussion of his health.

He said he was keeping fit on the campaign trail through his energetic speaking style and offered his prowess as a golfer as evidence of his fitness.

His appearance followed questions about his rival Hillary Clinton's health after it was revealed she was suffering from pneumonia at the weekend.

The 70-year-old was asked about the fact he would be the oldest president to take office if he won, and replied: "I would be just about the same age as Ronald Reagan - Hillary is a year behind. I actually feel as good today as when I was 30.

Details of a letter from his doctor declaring the Republican to be in excellent health were released earlier in the day.

It listed his weight, cholesterol, blood pressure, blood sugar and other figures, however critics will point out it does not constitute medical records nor does it give details of his medical history.

Seven so Mr Trump's campaign used his doctor's clean bill of health to launch a sideswipe at Ms Clinton, announcing that he had “the stamina to endure — uninterrupted — the rigours of a punishing and unprecedented presidential campaign and, more importantly, the singularly demanding job of President of the United States”.

During his apperance with Dr Oz, Mr Trump explained how he was managing to stay in shape during the long campaign.

“It’s a lot of work,” he added. “You know, when I’m speaking in front of 15, 20,000 people and I’m up there using a lot of motion, I guess in its own way it’s a pretty healthy act.

“A lot of times these rooms are really hot, like saunas and I guess that’s a form of exercise.”

He said he could not play golf as often as he'd like, but occasionally found time to play with Tom Brady, New England Patriots quarterback.

“I feel I’m the same age as him. It’s crazy,” he said.

His doctor's letter listed Mr Trump as six foot three inches with a weight of 236 pounds, giving him a body mass index of 29.5, which is considered overweight. A figure above 30 would make him obese.

Mr Trump admitted he wanted to lose 15 pounds.

His appearance came as Ms Clinton returned to the campaign trail after taking three days off to recover from pneumonia. She appeared energetic and chatted to reporters aboard her plane en route to an event in North Carolina and said she was "doing great".

In a TV interview she said: “I'm really glad that I did finally follow my doctor's orders and take some days to rest instead of just trying to keep powering through, which I think is a common experience for people."