A weight-loss medication eased Serena Williams’s comeback. Experts can’t agree on whether that counts as doping.

Competing while using banned substances is one of elite sports’ most fiercely protected red lines. But this weekend, in the shadow of a Las Vegas casino, comes a one-day competition that has sparked ...

On May 24, the inaugural Enhanced Games will be held in Las Vegas. At the Olympic-esque event, which will feature track, swimming and weightlifting competitions, performance-enhancing drugs — steroids ...

Competing while using banned substances is one of elite sports’ most fiercely protected red lines. But this weekend, in the shadow of a Las Vegas casino, comes a one-day competition that has sparked ...