Subway Surfers Addiction wrote:
I may be wrong on this but although your hemoglobin rises at altitude, your reticulocyte levels (which are subtracted in the off score) also rise to keep a relatively stable score (within reason). Whereas under epo and autologous transfusions the reticulocyte level just plain falls while hemoglobin rises.
It's the opposite for the reticulocytes (hemoglobin *may* go up in all of those scenarios). So in order to stay within your own individualized thresholds, a cheat would
a) go to altitude to raise your threshold, raise Hb a bit, lower RET-% a lot;
b) at altitude add EPO, raising Hb and RET-%. Pre-comp only.
http://sportsscientists.com/2015/09/paula-radcliffe-off-scores-and-transparency/(Note that some values discussed there were extrapolated, and later corrected, e.g. the 23% Hb increase after the half marathon in the low 70s was corrected to 30% once the real numbers came out. )
Tempting, isn't it? Now look at the numbers we know from Paula.
Close to competition, where one wouldn't use EPO anymore, her post-altitude values were Hb's of 12 and 13-something, and RET-% = 0.4.
The rather low Hb values are corroborated by Canova's observation that well-trained athletes with altitude experience see next to no change in Hb concentration but better oxygen transport (he calls that higher O2 affinity, which - sorry - is scientifically wrong however).
The low RET-% are the classic response to extended altitude.
Now the one time we know of Paula was pre-comp, her altitude values were 16.2 g/dl and 0.8%. She was 400 m higher or so, which may explain a higher Hb by maybe 0.5 g/dl or even 1 g/dl (but not 3 - 4 g/dl!), but then the RET-% should have been lower than before, not doubled. That's when she was flagged for the third time.
Unfortunately, thanks to Paula's and the IAAF's anti-transparency stance, we will likely never see the ruling in the end, but we do know that it was not an unanimous decision of the three experts (like in the case of EPO cheat Savinova as discussed in the recent "likely doping" thread). We don't know whether it was 1 : 2 or 2 : 1, as the IAAF wouldn't comment.
So in summary, 1 or 2 of the three final reviewers judged that those values might have been caused naturally (in dubio pro reo), and that 1 or 2 were convinced that it was doping. Since an unanimous ruling is required for a ban as per the IAAF's chosen guidelines, she was not punished.
Those are the facts according to the IAAF and Ross Tucker. Make of that what you want.