by

“Pretty Stupid”?

You decide:

British explorer Ranulph Fiennes completed his sixth marathon at dawn in Egypt, leaving him with only one more to run to achieve his goal of seven marathons on as many continents in the space of a week.
Sir Ranulph, 59, who suffered a near fatal heart attack only four months ago, ran the 26-mile (41.5 kilometre) distance between the pyramids at Giza, south of Cairo, and Cairo airport in five hours and 14 minutes.
. . . .
Following Thursday’s Singapore run, Fiennes said the challenge had been a mistake, admitting he was “pretty stupid” to take up such a dare so soon after undergoing a double heart bypass operation.

Forget the running, the travel alone would wear me out:

Apart from the marathons, Fiennes is expected to clock around 45,000 miles (72,000 kilometres) in air travel.