Jiu Jitsu training typically entails live sparring, called rolling

https://technicalgrappling309.dovetailscope.com/posts/a-parent-s-overview-to-enrolling-your-child-in-gracie-barra-jiu-jitsu-classes

Jiu Jitsu training usually includes live sparring, called rolling, where students apply techniques in real-time versus immune partners