2 ms·
the 4 minute mil started getting broken more often when people started using pacers. then tracks got faster due to new materials we started having more full t
by gameswithgo 9y ago
the 4 minute mil started getting broken more often when people started using pacers.
then tracks got faster due to new materials
we started having more full time pros.
The mental barrier thing is possibly not a first order cause of any of this.