How fast could Robert Barrister run a mile today?

who among today's athletes could break 4 on cinders, gusting wind, with the old shoes on,

training 30 miles a week maybe, .. ???

Modern track and cheater shoes 3:47 easily

Worst case scenario 3:39.99

He would run 30 miles a week today, cross train on an arc trainer and break 3:40.

And run X-country.

Roger Ballesteros would undoubtedly shoot a 62

Robert Barrista was the first to make a flat-white in under 4 minutes. Who knows what he could have done with modern technology?

Barristers world record was broken by John Candy. Lou Reed wrote a song about him: Candy says I've come to hate my body and all that it requires. What could Candy have run in Dragonflys and with a better diet?

Yeah but Barrister had the help of Chris Castaway. Candy ran sub 4 in a real race.

Not nearly as fast as Raymond Bollinger. That's clear.

Bannister was a pure amateur athlete, but I don't think you call what he was doing "simply (running) for fun.."

He was intense to the extreme in his training, and particularly the effort he would put into a race, running himself completely to exhaustion in the first sub 4:00 and the race against Landy in the Commonwealth Games.

Given a modern track and shoes, and greater time to train and recover (his training - the key session being 10x400m was squeezed into his lunchtime break), I think it's reasonable to put Bannister in the 3:50 range for a mile.

He would have just turned 95. No technology would make up for time.