fittest

"I am back and really enjoying my rugby, I am feeling the fittest I have ever done," Breach told BBC Sport.

Little is the driving force behind the idea, having seen Murray - known as one of the fittest athletes on the ATP Tour in his heyday - reap the rewards from lots of time on the machine.

On a more philosophical level, Klaas writes that it’s a “tragic mistake” to believe that “’survival of the fittest’ — with overtones of relentless, flawless optimization” fairly describes evolutionary principles.

Once described as the "fittest" match official in global football and a martial arts expert, he is now learning to walk again after a rare condition left him paralysed from the waist down.

"People say, 'Doing Strictly, do you feel fitter?' And I reckon I will be the fittest I've been in a long time, but at the minute I think I'm just recovering," he said.