Go away Ventolin wrote:
Imagine if you are able ... these athletes running on cinders and in 1967 footwear. Now imagine how fast Jim Ryun would’ve run if he had carbon plates and floating over the rubberized carpets of 2019 ...? 3:29.9 & 3:47.6
Ryun ran as fast as he could. Period.
Your spurious calculations don't help him to run any faster.
WRONG. The Swedes were actually the first to go sub 4 in like the 40s.