jilbiker said:
Contador's performance this season is consistent with riders in post doping suspension era. They can't seem to find that killer touch any more. His win at the Vuelta 2012 was similar to Ivan Basso's Giro win post his suspension. After the Giro we never heard anything significant from Basso. AC is doing his best this season, I don't buy the sick excuse from Saxo, his best doesn't cut it.
I say this is a bread and water AC and the truth is that it doesn't cut it, the peleton is still on PED. Will he risk it and juice for TDF? I doubt it, its way too late.
Well, here's a theory, well to not degrade the word any further, let's call it speculation.
After the recent doping busts of several low-level riders caught with GW-501516 in their samples, we can safely assume that at least part of the peloton has changed gear
[1] from traditional blood doping, such as EPO, to metabolic modulators, such as GW-50, Telmisartan and Aicar. We also know that different people react differently to different medication, adding at least one additional factor to the genetic predisposition to do well in cycling and other sports. What if this alone might cause a shift in dominance between top riders. It might not be unreasonable to think that the odds are that there is no single rider that benefits the most from every variety of PEDs.
From what I've read on fora related to the use of doping (e.g., bodybuilding fora), GW-50 seems a great drug to enhance overall endurance, but, if used to enhance endurance maximally, might actually inhibit sudden bursts of high power needed in heavy weight lifting or, for instance, pure anaerobic sprints. In the bodybuilding community, this is mainly explained by a shift of metabolism to and increase in aerobic mechanisms, such as fat burning (main reason for bodybuilders to use the drug)
[2]. In short, it might favor those riders with a riding style of continuous high watts (ala Sky-train) in stead of those with the ability to maintain high anaerobic attacks for a greater period of time than the rest (ala attacking with two to three km's to go, like Contador used to do).
Remarks
[1] "Gear" is often used on fora discussing the use of PEDs as a term for those PEDs, such as steroids and, more recently, SARMS and other peptides. Might those "gear problems" given so often these days after a bad performance be a euphemism for selecting the wrong drugs? I think not, but I can't help thinking that every time a rider is quoted saying something like that.
[2] Some anecdotal evidence, stories from GW-50 users on steroid websites, seem to suggest that the user might maintain aerobic metabolism at higher heart rates than usual, but were sometimes unable to use glucose as a fuel. This remind me of De Gendt saying that he was getting dropped on a climb with a very high heart rate, but not feeling very much pain or a feeling of being wasted. Oh, well, speculation. There are so many possible explanations...