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Sumo: David vs. Goliath
February 10, 2017
In Malcolm Gladwell's very popular book David and Goliath: Underdogs, Misfits, and the Art of Battling Giants, the author deeply explores the lessons behind the three-thousand-year-old Biblical story of how the small young David defeated the giant warrior Goliath.
MMA Champion, Lyoto "The Dragon" Machida, Incorporates Sumo into his Fighting Style
January 5, 2017
A prime example of how a MMA fighter has incorporated sumo into his game is former Ultimate Fighting Championship (UFC) Light Heavyweight Champion Lyoto "The Dragon" Machida. He has a strong sumo background, but his primary style is traditional Shotokan karate.
Sumo: A Case Study in Size vs. Technique
November 7, 2016
Sumo is the fusion of honored ritual with unbridled power. Even in a combat sport like sumo, where great body mass and girth are often winning factors, superior technique can overcome size and strength.
The Hidden Roots of Karate and Jujitsu
October 5, 2016
This article will discuss several martial arts to illustrate how different looking martial arts are apparently closely related and how the idea of hidden historical roots applies to many martial arts. First the origins of karate and Okinawan sumo will be explored. Then the root of jujitsu will be uncovered.
Brain Damage: Do Football Helmets Help?
September 5, 2016
Recently, the National Football League is facing a 765-million-dollar lawsuit filed on behalf of more than 4,500 former players regarding the concussions and potential chronic traumatic encephalopathy (CTE) sustained during their careers. Similar lawsuits are underway against the National Collegiate Athletic Association as well as the National Hockey League, and football helmet maker Riddell is facing multiple lawsuits over claims about the effectiveness of their helmets at protecting athletes from concussions.
Foam or Knuckles—Navigating the Illusion of Safety - January 18, 2016
If you really want to understand how gloves contribute to the safety of our athletes, especially when it comes to their brains, take a closer look at the physics behind taking a punch with a bare fist or a glove.
Guns, Knives, and the Hollywood Death Sentence - September 21, 2015
In order to become a successful screenwriter in Hollywood, you need to watch a lot of movies, so you can learn from the screenwriters who came before you, and so you can get a feel for what else is out there and popular today.  Unfortunately, this important part of a screenwriter's education is also how Hollywood ends up propagating and recycling incredibly stupid ideas over and over again to the point where the audience just accepts it without question.
Protecting the Brain from Trauma: A Home Experiment to Show We Can Do Better - September 7, 2015
If you put on a football helmet right now and smacked yourself in the head with your hands, you might notice you can hit yourself pretty hard before you start to feel pain. You could even grab a stapler or a coffee mug and hit yourself with that. If you are like me, smacking yourself in the head is the first thing you do when you put a helmet on, just to test it out.
Never Hit A Girl…Unless She's Armed - September 29, 2014
Sun Tzu and Miyamoto Musashi made no distinctions regarding gender. To them all adversaries were defined as combatants. In today's world, distinctions of gender are made by friends, family, police, and the courts. The role of combatant is, oftentimes, secondary. While experienced bouncers, bodyguards, law enforcement officers, soldiers, jail guards, and martial artists know that women can be just as dangerous, or possibly even more so than men, (such as instinctively going for the eyes during an attack) the courts don't often see it that way.
Principles Common to Both Qin Na and Ground Fighting - September 30, 2013
A lever is the simplest of machines, which utilizes a rigid bar to rotate around a fixed pivot point called a fulcrum in order to exert force on an object (load). If the resistance or load exceeds the strength of the bar, the bar will break. Biomechanically speaking, the arm is a bar, and when the fulcrum is at or above the joint, breakage can easily occur.
Sport versus Combat - May 27, 2013
It was the first time I’d ever made it to the finals. Win and I’d take home the first place trophy; lose and it’d still be a pretty cool piece of hardware. I’d come in third a couple of times, but the little statues weren’t nearly as prestigious as the big ones. And I really, really wanted to earn one of the big ones.
The Ground. The Dirty, Filthy, Dangerous Ground - April 29, 2013
The Raiders fan had biceps that could put Hulk Hogan to shame and a physique that was nothing short of awesome. He stood out in a bar full of average guys, not only because he was ripped, but also because he was the only person cheering for the other team, the only one doing it vociferously anyway.
Four Chokes and Cranks for Street Use - February 27, 2012
The type of chokes and cranks discussed here are designed for the street. Several of them have been banned from judo competition because they are too dangerous for sport.
Interview with Kris Wilder, Nicholas Yang, and Rory Miller about "Crossing the Pond Martial Expo 2010" - September 13, 2010
YMAA Publication Center supported the inaugural "Crossing the Pond Martial Expo" held Aug. 14-15 in Seattle, and Aug. 21-22 in Coventry, UK. This expo brought together six well-known and highly-skilled instructors of martial arts and self-defense.
Listen to the Subtle (and Not-so-Subtle) Warnings - January 6, 2010
We’ve spent much time writing about awareness on the street. It’s important in relationships too. Don’t turn your brain off when you walk into your home.
Violence: What Everyone Needs to Know About Fighting - August 2, 2009
According to the Bureau of Justice Statistics, men commit about 80 percent of all violent crimes in the United States, serious stuff like homicides, rapes, robberies, and assaults. Men are twice as likely as women to become victims of those same violent crimes, except for rape.
Mob Violence Is An Eruption With No Warning - February 17, 2009
Gang violence gets a fair amount of copy in the media. But another form of violence is mob violence.  Mob violence rises up, explodes, and then recedes.