There is a difference between hiding it well versus not feeling it. As a martial artist, you pay up-front (desensitize drills) and draw on it when you need it. You train to push pain and feelings aside – you don’t
Environment(s)
When we talk about the environment, most people associate it automatically to the physical environment / situation that you face during a conflict. For example, are you fighting over slippery surface? is the ground flat? are there obstacles or hazards