http://www.muscleweek.com/is-usain-bolt-on-steroidsSome of the article is poorly researched/worded but you get the gist. Even though the article is referring to Bolt it applies to everybody else to.
This part of the article stood out to me.
A typical PED cycle would begin 12 weeks out from competition with the target date being the day prior to or of the competition. Along with the use of undetectable steroids and daily growth hormone injections, the athlete would also have his blood drawn on a daily basis to monitor his testosterone and rhGH ratios in an effort to keep them within Olympic World Anti-Doping Agency (WADA) testing limits. Close monitoring of these ratios allow an Olympic sprinter such as Bolt to both use PEDs up to the day of competition while still comfortably submitting to multiple drug tests.
This isn’t evidence particular to Usain Bolt, as it could just as easily describe the protocol that every Olympic sprinter is using to pass the drug tests. However, it is mentioned simply to point out how easily Olympic athletes are able to pass an Olympic-level drug test, even with the highest levels of scrutiny. The bottom line is that if an athlete is within the permissible testosterone and rhGH ratios, he is deemed clean. The reality is that any athlete who doesn’t maximize his testosterone and rhGH levels to the maximum permissible level has no chance of breaking a world record.
For example, let’s assume that a talented NCAA sprinter has a testosterone ratio (testosterone: epitestosterone) of 1:1 which is considered normal, or average. The current WADA guidelines permit a ratio of up to 4:1. Given the fact that the only way for an NCAA sprinter to make any money sprinting is to win international competitions and garner endorsements, what reason could that NCAA sprinter possibly have for NOT quadrupling his testosterone ratio up to the maximum of 4:1? Using a number of undetectable steroid compounds, that same athlete would presumably see a major improvement in his sprint times without ever ‘testing positive’.more info on test:epi ratio-
http://www.rxmuscle.com/articles/chemical-enhancement/2325-understanding-the-testosterone-to-epitestosterone-ratio-drug-test.html And this is the folly of drug testing: It gives ‘dirty’ athletes all the ammunition they need to proclaim themselves ‘clean’ — replete with Olympic level testing results.
The worst argument that anyone can make for Usain Bolt being a clean athlete is that he has yet to fail a steroid or other drug test, despite being subjected to rigorous drug testing protocols.
The reality is that most Olympic athletes have their blood levels so closely monitored that only an egregious miscalculation in the timing of a steroid injection or use of a masking agent (i.e. diuretics) to dilute the levels of a steroid within the blood would result in a positive test. This is the only reason why we rarely see positive tests for Olympic level athletes.
International steroid expert Anthony Roberts told Muscleweek: “With regards to fooling the Olympic drug tests, many of the same loopholes that existed ten to twenty years ago still exist today. Until those loopholes are closed, there will always be a shadow of doubt falling on the Olympics.”
Roberts continued, “Testosterone, hGH and most of the other highly potent anabolics are virtually undetectable — when we see a positive test and a tearfully apologetic athlete, he or she probably represents less than 1% of those who are actually using banned substances.”