I have been thinking over this topic for a very long time now. About a year. I have videos of myself trying different techniques so that I could look back on my technique, and also some sparring/playfighting with a cousin of mine. These videos date as far back as a year and some of these videos are recent. What I have noticed in all of them is that I strongly cringe at the posture of my back in my fighting stance. When I walk, ever since I was little, my parents did their best to teach me correct posture whilst walking: chin up and forwards, shoulders back, with the back of my head being in line with my back to keep the natural curve of the spine. However, when I instinctively tuck my chin In whilst fighting my posture goes to the mud. I will attach some files to show this. I have two pictures whilst I am practicing showing my posture (which makes me look like a giraffe with my neck stuck out) and the posture I attempt to keep whilst I am walking, relaxing etc. Posture comparison This is a private imgur post with these pictures. I wish to know, what is the correct posture when fighting? If I try to tuck my chin in while keeping my back straight in a boxing stance, it feels uncomfortable. Are there any exercises that can help with this? What should I do?