Edmondson won a gold medal at the 1968 Summer Paralympics in Tel Aviv in the 50-metre freestyle class 4 incomplete swimming event with a world record time of 0.44.1 and a gold medal in the 100-metre open freestyle swim event with a world record time of 1.33.0. She also won a silver medal in Women's 50m Backstroke class 4 incomplete in a time of 52.3.
