Stenson's running career started when she was in primary school, where she ran south east cross country. In 2000, she was selected for the South Australia representative cross country team. where she set an Olympic A qualifying time of 2 hours, 31 minutes. In 2012, her training regime included running up to a week. She was the third South Australian athletics competitor to qualify for the Games, She finished the Olympic marathon in 39th place with a time of 2:31:17, 8 minutes and 10 seconds behind the first-place finisher
Tiki Gelana. At the
2014 Commonwealth Games, she won the bronze medal, running a then personal best of 2:30:12. She came 13th in the same event at the
2024 Paris Olympics in a time of 2:26:45. She finished ninth in the
2017 IAAF World Championships marathon in a time of 2:28:59. This was the best performance by an Australian woman in a World Championship Marathon.
Personal bests As of April 2026, • 24th, 1:14:21, IAAF / SINOPEC World Half Marathon Championships, Nanning, 16 October 2010 ==Recognition==