There is every reason to doubt, for people IGNORANT who don't know anything about real training and his effect.
We don't care about people who want to speak without knowing anything about the argument of the discussion : this is the typical behavior of IDIOTS.
I'm accused to be "apologist" of doping, when instead I think the BEST WAY for facing doping is to REDUCE the idea of the effect on the performances (I speak about BLOOD DOPING ONLY, about roids / muscle strength there are no doubts that training only can't produce the same effects).
We know where is possible to arrive CLEAN : at WR in 2:01:39 in marathon, or 7:53.63 in steeple, for example. Or in 1'40"92 in 800m.
We know where is possible to arrive with training only, and NOT YET PERFECT : 26'30" in 10,000m with less than 3 months of specific training with big talent, or 12'49" in 5000m with great continuity for years but medium talent.
We know where is possible to arrive if you are WHITE EUROPEAN : 2:05:47 in marathon, or 59:13 in HM (and after those results, now there is a new European sunrise in Marathon).
So, if doping can give the advantages you think, it means that the DOPED WR of Eliud becomes 1:57', the WR of Shaheen becomes 7'45", the WR of Rudisha becomes 1'39", the 10000m of Nicholas Kemboi become 25'30", the 5000m of Thomas Longosiwa become 12'19", Sondre can run under 2:01 and Julien Wanders in 57'20".
Who is the idiot amont WHO KNOWS THE LEVEL OF CLEAN RESULTS ALREADY ACHIEVED BY CLEAN ATHLETES, and the "believers" in doping who don't know anything about training, don't know anything about talent, don't know anything about the REAL results, but have faith in reseraches carried out with different subjects, THAT CAN'T DEMONSTRATE ANYTHING APPLIED TO OTHER ATHLETES ?
Here, I don't deny the FACT that several top athletes used doping.
I don't deny the FACT that doping is widespread.
I don't deny the FACT that doping is a big business.
I deny the SUPPOSITION that without doping is not possible to reach performances THAT ALREADY CLEAN ATHLETES WERE ABLE TO ACHIEVE.
You are the one denying the REALITY, without having in your mind a second option.
You are obfuscated by stereotypes, and refuse to KNOW a part of the reality.
For that reason, you are a group of STUPID without any ability, and any interest, in analyzing ALL THE INFORMATION about the reasons at the base of top performances.
Not "mindweak", but of sure "limited minds".