Actually, the concept of polling is that you take a sample of the population, study their results, then use that data to arrive at a number which you can prove to be correct within a certain % using statistical tools.
Bob, you know about the bell curve and standard deviation, don't you?
Yeah...I wen't to school myself.
I also know that I find it hard to believe that this particular Dr. in all probability, has seen/ diagnosed enough of the athletes at the Olympia level, to make such a statement that 50% of them are suffering from this or that...
If he tested 2 Olympians, and 1 happened to have these symptoms...I guess he could say 50%...but he would also have to disclose that he has tested only 2...either way, it would hardly be a reflection, or any conclusive evidence of ANY sort of study.