One of the difficult things about teaching self defense compared to participating in sports is that in sports, there can be some variation in strength, height, body composition and so on, but people are about the same size while in self defense you have to train for wildly varying sizes and levels of fitness. I'm 260 pounds, and I used to spar a college football player that danced around at 430 pounds, so even at my size I wasn't immune to the possibility of fighting a huge f-ing guy. The fact that you have to deal with people of different sizes means you need about 3 times as much material. You need stuff for when you are the same size, when you are bigger (because smaller guys that aren't afraid of your size are dangerous) and when you are smaller. Some things are easy to teach and easier to assign priority. The priority of learning techniques for one size person vs. another is taken care of by the fact that your class probably has the same spread as the normal population - so big people will learn more about fighting smaller people, but they will still get time to fight other big people. All through my TMA training, and definitely through my MMA training, even when the instructor was skilled enough to tailor his curriculum to the individual, the foundational structure always remained the same. Generally, martial arts instructors are convinced that the way they teach punches, kicks, and stances are the most optimal way they know and the way they teach to do them is the same for everyone, big or small. The differences between big and small people are in application (big people can counter kick while going straight back while small people counter kick by hopping to the angle, and so on). What I'm kind of mulling over in my head is the idea of changing the foundational stance and structure for small people vs. larger people. As a large person, I generally like my structure and believe in it. I stand with my feet a little over shoulder width apart, back toes just behind the front heel, with the back foot and knee pointed straight at the opponent, hands up in one guard or another, but lower than some people taught me. Because of my size and the fact that the striking is designed for small gloves and to facilitate kicking, I can hurt large people very badly with kickboxing style punches, by pivoting my hip mostly and my feet barely, without sitting into the punches. My rear foot is pointed straight towards the opponent because I do not need much room to build up kicking power. Room is my enemy because I don't have a damage problem. I have a speed problem. So I chamber a lot of kicks as front kicks. I bring my knee straight up on the muay thai round house and turn over at the end so much that I can throw it within a few inches of a wall. Bringing everything up straight makes me faster than I would be. On the other hand, people with lean body weights under 150 or so might benefit from a more traditional structure: knees bent a little more, base a little wider and the rear foot pointed out a little. The reason being that for a smaller person to hurt the more likely opponent - the large person - they need to generate a lot of force while speed isn't an issue for them (when dealing with comparative speed vs. reflexes). With the rear knee pointed out, round house kicks, both TKD and MT style, have time to accelerate more by swinging in from the outside. They can get more speed and more weight although the longer path causes them take a little longer to get to their target. By slowing up kicking combinations a little due to sitting into one's punches more, you buy a split second to assess the damage your punches have done before you commit to the kick (potentially getting snatched up) and you deliver stronger punches - which you need to do to hurt a bigger guy. If you read all that and have an opinion, thank you. I am not committed to this. I'm just thinking and mining ideas.