To find sources that answer this question, we need a wide variety of sources. As stated before, at least 1 or 2 reports or studies must be found that compares the negative impact of mental health in fighters across a wide range of combat sports. As well as this, the main causes for these mental health problems must be identified. Moving on, some reports and papers on the experiences of pro fighters must be discovered so that we are able to gain insight onto the experiences of an EXPERIENCED veteran in the field. The cause for that must be established, how quickly the fighter was able to bounce back, and what caused them to feel better. The to what extent aspect of the question will include many variables that have to be considered. These are linked below.