Not to take away from their hard work, but a lot of guys (and girls) at the top levels seem unnaturally big...
While it is generally assumed that they don't take anything funky, do these giant athletes on the National Team ever get tested at events? Are they ever confirmed natural rather than assumed natural?
for the ones who are halfway decently in shape I don't think most of them look unnaturally muscular. They look like typical amateur sprint sport athletes. There are probably some who are doping but the odds are pretty good that they won't get caught given the ineptitude of the governing bodies.
Then there is a not insignificant percentage of others who are unnaturally FAT. They are using all right - using chocolate donuts, cramming fistfuls of sweetened cereal into their mouths, loading up on the loaded 'tater skins.... and enhancing the body building by sitting in front of the TV most nights but making it out to dragon boat practice 3 times a week.