Global Athlete, an athlete-led group working for change across the sporting world, said the ruling to allow Russian figure skater Kamila Valieva to compete in Beijing is "another example of the failures of the global sport and antidoping system."
The group said the fact that Valieva — a 15-year-old — tested positive for a banned substance is "evidence of abuse of a minor."
"Sport should be protecting its athletes, not damaging them," it said in a statement.
"Doping and the trauma of a positive test pose grave physical and psychological risks to all athletes but especially to minors. It is unacceptable that these risks have been placed on a fifteen-year-old," Global Athlete said.
"The volume of abuses athletes have endured over the decades can undeniably be attributed to the power imbalance that sport leaders, administrators, and coaches have over athletes."
The group said athletes need professional representation and "the ability to collectively bargain."
"It is blatantly clear that Valieva would have never been placed in this position if the World Anti-Doping Agency (WADA), International Olympic Committee (IOC), and the Court of Arbitration for Sport (CAS) had done their jobs and banned Russia from global sport," the group said.
"The doping of Kamila Valieva must be a wake-up call for every fan, parent, and athlete to stand together to demand reform. The doping of minor athletes must be stopped."