We will follow the meaning of Enshin in both our training and our daily lives. Those are the words of the “dojo kun,” or the school’s guiding principles. You’d find a similar scene on any day after ...

David Shim (in black), a ninth-degree black belt in karate, practices jiu jitsu with a student at his Boston studio. After decades of studying and teaching karate, Shim took up jiu jitsu in 2006.

We are all aware that exercise generally has many benefits, such as improving physical fitness and strength. But what do we know about the effects of specific types of exercise? Researchers have ...