Cartoon Girls Boxing Database

 https://www.youtube.com/shorts/GuEpuAdJvTI Fan animation featuring Videl working out.

An episode about how Mari became a boxer. Features a sparring session against her senpai Nagahama.

"From Kaori Ozaki, author of the gods lie. and Mermaid Prince, comes another poignant exploration of love, family, and belonging. After leaving her isolating life in Tokyo, 34-year-old Nichiko returns to her remote island hometown for her estranged alcoholic father’s final days. There she meets Chimaki, an eccentric young man who stirs up old memories—and feelings Nichiko had all but decided she no longer deserved. But despite his puppy-like enthusiasm for life, Chimaki’s almost obsessive need to help those around him seems to be compensating for an unspeakable past…" Like the title implies, features some scenes of the main heroine working a punching bag.

Lara remembers how she met Mari.

https://www.viz.com/shonenjump/shinobi-undercover-chapter-94/chapter/51046?action=read An enemy named Yuzu fights using boxing.