Source: © John Lamonica [CC BY-SA 3.0 ( http://creativecommons.org/licenses/by-sa/3.0 )], via Wikimedia Commons

Brazilian Jiu-Jitsu, commonly called BJJ, is one of the fastest-growing martial arts in the world. First introduced to the U.S. in the 1980s through the creation of the UFC, BJJ has gathered a tremendous and dedicated following.

BJJ has become established as a very pragmatic, and highly effective discipline, and BJJ techniques are dominant in mixed martial arts.

BJJ is a sport embraced by many celebrities, from actors Ashton Kutcher, Joe Rogan and Ed O’Neill to the late chef Anthony Bourdain, playwright David Mamet, and philosopher Sam Harris, many of whom have written or spoken about the things that draw them to the sport.

As a clinical psychologist and a long-time student of BJJ, it is the psychology of this sport which I find most intriguing. Why is BJJ so powerful and captivating for so many people? Why has BJJ become so popular, with so much dedication from its students, who so often describe the experience as uniquely addictive?

BJJ offers many unique experiences that trigger rich, subtle, and fulfilling psychological changes in its students — changes that promote positive transformation and keep people coming back to the mats.

One of the things that distinguishes training in BJJ is the fact that from day one — the first time you step on the mat and attend an introductory class — you are grappling face-to-face, body-to-body, with other students. While drills and technique are critical to successful BJJ, from the first class, students must pit themselves against other students. This pragmatic strategy is core to the of BJJ, which attempts to apply these skills in real-world defense situations. From the beginning of training, students of BJJ learn to experience what these skills are like, used by, and against, people with varying degrees of skill, strength, and technique.

It is the constant physical contact in BJJ which I think is one of the most powerful and influential experiences driving the BJJ experience.

Many people today are starved for physical contact. It is a sad fact that many people go through each day only experiencing a few handshakes as their only experiences of touch from other people. Cuddle parties and professional cuddlers are tapping into this hunger.

Without knowing it, students of BJJ offer each other a powerful, affirming, accepting, and biologically-mediated experience, simply through the body-to-body contact that occurs throughout BJJ. Such contact triggers the release of neurochemicals in our brain and throughout our body, which make us more aware, focused, and connected. is one hormone often called the “cuddle” or “ ” hormone, which is released in the body during such physical contact. It is likely one reason why friendships develop so quickly and deeply amongst BJJ students. (I’m not saying that much cuddling really happens at BJJ. Brazilian Jiu-Jitsu is the alpha male version of snuggling.)

But, this close physical contact occurs in the context of intense interpersonal , in a stylized struggle for survival, and a very real struggle for physical dominance. The nature of competition and survival triggers other intense psychological and physiological changes. In such situations, our brains and bodies react, preparing us to flee or fight, but also to be very alert. Norepinephrine, adrenaline, and cortisol flood our bodies and synapses, decreasing our reaction times, increasing our heart rate and respiration, and enhancing our focus and awareness.

is a powerful modern concept of psychology borrowed from Eastern , where people are encouraged to focus on the here and now, setting aside worries over past or future. In mindfulness exercises, patients are taught to attend to their surroundings, their sensations, and their immediate experiences. This same level of immediate, focused alertness is a common, powerful effect of BJJ.

Frankly, when you have a two-hundred-pound opponent sitting on top of you and trying to choke you into unconsciousness, it is psychologically impossible to devote mental resources to worrying about the rent, school, or work. In such situations, our brain recognizes a survival situation, and forces us to focus with intensity on our immediate experiences. BJJ is often the only thing that can get worries and frustrations off of my mind.

The combative and competitive experiences of BJJ are likely to increase levels of (T) in many people’s bodies. The nature of the sport draws people who have naturally higher levels of T, and research has shown that in athletes and police officers, competition and combative situations increase T levels even further. It’s not by accident that so many men in BJJ have beards, a common trait associated with high testosterone levels.

During intense exercise, our brain also releases a protein called Brain-Derived Neurotrophic Factor, or BDNF. This protein protects and repairs tissue, and yields a powerful feeling of euphoria. BDNF is one of the sources of the “runner’s high,” that feeling of elation and satisfaction that often follows intense exercise. The effects of this protein, and the enhanced activity of our brains after such strenuous exercise help us to be more energized and focused, in positive spirits through the rest of the day.

The powerful experiences of BJJ are not related solely to biological effects though. BJJ offers a never-ending feast of self-improvement, where one can measure their accomplishments daily, both against self, and against others.

When someone first starts training, it’s difficult to avoid freezing or being overly physical and aggressive. But over time, our minds acclimate to these situations, finding places where we are safe, where we can use more technique and less strength. Even with the powerful neurochemicals of flooding through us, one can begin to play physical chess, planning out moves and reactions, strategizing attacks and defenses. As an evolving sport, people are constantly developing and winning with new techniques, forcing the sport and its practitioners to also continue to constantly develop.

It is a powerful sense of accomplishment to realize that you can keep yourself safe when under attack, even by a larger, stronger opponent. This is one reason I think that BJJ can be such a powerful healing experience for many women, including those who have experienced . The physical experiences of BJJ, the and the ability to act to protect oneself, can increase anyone’s feeling of personal safety.

Further, such experiences may help some people to rewrite their bodies' reactions to situations. BJJ can help them acclimate to physical situations uncomfortably reminiscent of the trauma, and learn ways to find safety and security, even in the midst of physical confrontation.

There are few places in life these days, where one-on-one, body-against-body, physical competition is endorsed and readily available. There are even fewer like BJJ, where best friends can compete aggressively in one moment, then step off the mat and celebrate each other’s accomplishments.

BJJ has become an intense, tightly-knit, strongly supported community. Social media is filled with BJJ-related , celebrating the unique, insider experiences that bring these athletes together and separate them from others. BJJ gyms are popping up around the world. I know, from experience, that I can walk into any of them and be welcomed. I’ve trained in schools across the United States, and on far sides of the world, and have found this to be the case. This strong sense of community, family, and connectedness is one of the aspects of BJJ which cannot be ignored, fueling people’s excitement and interest in the sport.

It remains to be seen whether BJJ will maintain its status and dedication amongst its students or whether this is a fad. I suspect that as long as BJJ continues to evolve, continues to offer novelty, new challenges, and growth, that the sport will continue to draw new students and retain its influential position. It is the dynamic nature of the sport which is so psychologically compelling, and which offers students so much room for personal development.

David Ley, Ph.D. holds a black belt in Brazilian Jiu-Jitsu, studies BJJ at Gracie Barra New Mexico, and is on Twitter at @DrDavidLey.