I ll give u guys the answer for free, and try to remember it for the rest of your life.
The athletes that have those world records are just better athletes than the ones that are trying to break their world records.
Look at Marion Jones and what she took - HGH, EPO, steroids,insuline, blood doping etc.--- yet still beeing naturally fast and drugged better than anybody else, ever, failed to get close of any of the records.
Drugs are working with what YOU have- and you can t make gold out of shit.-even with the bigger and the better amount of drugs.