Allyson Felix, the most decorated woman in track and field history, called the U.S. Supreme Court's ruling ending the constitutional right to an abortion "shocking" and a "step back" for women on Sunday.

The sprinter, who won a U.S. record 11 Olympic medals before hanging up her spikes after competing in her final World Athletics Championships last month, has also been a champion for working mothers and said she was blindsided by the decision.

"Any time rights are being taken away, that's shocking," Felix told said before taking part in sports apparel company Athleta's "Race for Change" in her native Los Angeles.