Her brothers, father and grandfather all boxed, but at age 11, Jenkinson began training in Judo.
[2] Jenkinson qualified for the Australian Judo Team, and competed in the 2000 Summer Olympics in the women's half-heavyweight event.
At the Queensland Country Athletics Championships, held at the University of the Sunshine Coast in April 2006, Jenkinson entered the women's 20-plus throwing events and won silver in the discus throw, gold in the javelin throw and gold in the shot put.
On 31 March 2012, Jenkinson, then of the Pacific Club from Redland Bay, defeated Katrina Harvey to win an Australian title fight at King's Theatre at the Warwick RSL Memorial Club.
Some of her team participated in the National Golden Gloves (Australia's amateur boxing championships), held at the Acacia Ridge Tavern, Brisbane.