[citation needed] In May 2015, she won the gold medal in the +73kg category at the 2015 World Taekwondo Championships in Russia beating Gwladys Epangue in the final.

[citation needed] In May 2019, at the 2019 World Taekwondo Championships, Walkden won the women's heavyweight title after Zheng Shuyin was disqualified after attaining a 20–10 lead.

Faced with Zheng's subsequent inactivity, Walkden adopted the tactic of repeatedly forcing her opponent out of the ring to raise her penalty points from seven to ten, an automatic disqualification.

"[7] In September 2019, at Chiba, four months after winning the controversial gold medal in Manchester, Walkden was defeated 7-5 by Zheng Shuyin.

[9] In 2021, she won the gold medal in the women's +73 kg event at the 2021 European Taekwondo Championships held in Sofia, Bulgaria.