In an era dominated by high-intensity interval training, biohacking, and wearable fitness trackers, society is constantly searching for the ultimate system to optimize human performance. Yet, the most ...

Although I am thinking about having my blue belt debut match before the end of the year, I am still considering what to do ...

A seasoned Karate black belt is left powerless as he faces Yagyu Shingan Ryu, a 400-year-old samurai jujutsu system that ...