As mentioned earlier, the incredibly fast stride frequency is a clue. I don't think you run like that by doing drugs. I'm not saying they were or they weren't, because I don't know. I'm just saying that, technically, the way they ran was fascinating. The fastest turnover rate for distance runners that I can remember, ever.
They are probably the most well trained group of distance runners ever, from 1500m through the marathon.
Plenty of guys can run that.