Holt took up athletics in 2014. At the 2015 IPC Athletics World Championships in Doha in her first major overseas competition, she won gold medals in world record time in two events: Women's 100m T35 (13.63 (w: +2.0) world record) and the Women's 200m T35 (28.57 (w: +1.5 world record). At the IPC Athletics Grand Prix in Canberra on 7 February 2016, she smashed her 200m T35 world record by running 28.38 (w: +0.2). At the 2016 Australian Athletics Championships in Sydney, she broke world records in winning the 100m and 200m Ambulant events.