Every athlete thinks they know what they are doing on the mat. Then you sit down with two videos of yourself, eighteen months apart, and find out how much of that was a story you were telling yourself.
This is my own analysis of two competition performances. I am writing it down because the students I coach are asked to do exactly this, and it would be a poor thing to ask of them if I were not willing to do it myself.
1. Fighting stance and posture
In the more recent footage I appear more willing to move forward, more dynamic between attacks, more frequently changing my distance, and less static. All of that is progress.
But I also noticed that my hands occasionally drop when I am waiting, particularly after an exchange. So: movement improved; static guard and posture slightly less consistent. That is an honest trade, and it is the kind of thing that only shows up on video. Nobody feels their own hands drop.
2. Footwork — one of my biggest improvements
This is where I see a meaningful change.
In the earlier footage I sometimes spend relatively long periods establishing distance before initiating. In the recent footage I am much more prepared to close, attack, recover, reposition.
My movement has become less "stand and react" and more "create the exchange."
That matters for a −61 kg kumite athlete, because I don't want to depend entirely on reacting to my opponent. Reacting is a losing strategy against somebody faster than you. Creating the exchange means you choose the moment.
What I would tell a student reading this
Film yourself. Not once — regularly, and at competition rather than in training, because training is where you are comfortable and competition is where the truth is. Then watch it with somebody who will tell you what they actually see.
The improvements will not be where you expect them. Mine were not in technique. They were in the willingness to move first.