Katheryn Winnick started doing Martial Arts at the age of 7 because she wanted to stand up to boys who may bully her. She once even boasted in an interview that the boys at school started to get scared of her because of how good she was doing.
She loved Martial Arts so much that she reached the top of her class and received her
first Black Belt at 13 years old.
Winnick currently holds a
third-degree Black Belt in Tae Kwon Do and a
second-degree Black Belt in Karate.
After she competed in the Canadian Nationals, Winnick went on to open a
successful Tae Kwon Do school at the age of 16 (he owned 3 at the age of 21).
Various Sauce: Lagertha - Vikings Cast - HISTORY.com