your comment is poorly put together. none the less, provide info on it.
i directly reference conversation with coach of Dixon on the1976 race with Viren. it doesn't come out of the blue. Dixon was pegged to win. I met Viren at the airport in a group, nice shy chap in that environment. at the time he was something of a hero, god. probably still is a fine fellow, where circumstance kind of boxed him in, for blood doping wasn't illegal or even on the radar for testing when he was using. come 80, it was a different story, in 80 Viren could barely make the final running like an old dog, and by a miracle there he was competiting at the bell lap in the final, though he ran out of miracles (reindeer juice).
google each topic and letsrun articles go deep on Viren's reindeer juice, which extended to the Finnish invasion of world beaters, similar to the kenya invasion of today. cross country skying was completely infected and it was a mainstay of the tour de france, which is a well known pioneering infestation of PEDs.
= google search
viren blood doping
horse racing sodium bicarbonate
1976 5000 m olympic games montreal
and try
sodium bicarbonate pubmed, for a real eye opener
regarding Foster
he originally was a great sport admiring Viren for his ability and wins, and was anything but a conspiracy theorist., wasn't very impressed when the very incriminating evidence came out a couple of years after the fact.
if memory serves, and it may not, but i recall Viren himself, in the age of total naivety talking about blood infusions himself, you take the blood bag at altitude, and jack after a heat, to be "fresh"