Because no foreign substances were involved, blood packing was considered legal, if unethical. At the 1984 Los Angeles Olympics, eight U.S. cyclists, including gold medalist Alexis Grewal, gave themselves transfusions of previously frozen packed blood inside their hotel rooms before competing in the 118-mile road race. The International Olympic Committee tested the riders, detected the doping, and briefly covered up the results before announcing, in 1985, that new rules were being written to ban any "artificial" means of altering one's blood chemistry.