doping regulations

Bach warns against Olympic boycotts, seeks re-election

American sprinter Stevens banned 18 months for missed tests

Most athletes are true to word in dates with drug testers

Study says US doesn't get value from WADA contribution

Trial of Diacks exposes dark backdrop of track golden era

American sprinter Coleman suspended for missing doping tests

Former IAAF president turns on son at corruption trial

Investigation finds doping cover-ups in weightlifting

WADA looks to artificial intelligence to catch dopers

Column: A look at some of the best sports documentaries