Riddle: What is a word in Jiu Jitsu performance?

Jiu Jitsu is different from ordinary acrobatics. Jiu Jitsu is more about the pursuit of human visual feelings and human limits. General acrobatics is famous for its thrills or high difficulty and complexity, but Jiu Jitsu is famous for training people's pain. General acrobatics relies on training human brain and limbs, while Jiu Jitsu is a passive stretching training for connective tissues and ligaments in human body. Therefore, in Jiu Jitsu, the bending form of human body is very complicated, so it is a "bow".