A shows Mr Armitage clearing the double brush fence in the water on the course in Badminton in Gloucestershire with ease, at the exact same spot where Phillips was forced to retire from the competition after her horse, High Kingdom, crashed into a fence flag.
However despite clearing all the fences with plenty of room to spare, he was considerably over the 11-minute 13-second time limit, taking almost four hours to complete the 6km course.
Mr Armitage said he was challenged to jump the course by his girlfriend, event rider Amy Williams.
He said: "I have been free running for almost eight years now and this was one of the toughest courses I've run.
"It was a lot more difficult than it looked. I had to count out my strides up to each fence, the same way a horse and rider would, to make sure I made it over.
"The fences are much bigger up close than they appear when you see them on the TV, and I did struggle with a couple of them.
He added: "My girlfriend still thinks it's more difficult to get around on a horse – but I'd disagree."