Kostrzewska studied blacksmithing, stock raising, and veterinary science, all unusual for women of her era, to enable her to better care for their horses.

She wrote many articles about horses in popular magazines, and published the first book on riding for women, Amazonka – Podręcznik jazdy konnej dla dam.

[3] Her mother was known for having pressed the Polish Equestrian Association to expand their regulations to allow competitive women's sidesaddle events.

[5] In 1911, she rode in an event sponsored by the newly created Równieńskie Towarzystwo Wyścigów Konnych (Horse Racing Society of Rivne) taking first place on her mount, Alouette.

Because she was fashionable and a noted beauty, she was painted by numerous artists including Wojciech Kossak, Wacław Pawliszak [pl], and Jan Rosen.

After being liberated from the camp in 1946, she returned to Poland and settled in Laski, where she worked as a secretary in the office of the school for the blind.