( CNN ) Under harsh lights in a private , rented room in Berlin , women face each other in violent , sometimes bloody battles of brute strength . There are no official rules to this female fight club . The fighters are both beginners and professionals , anywhere from age 20 to 50 , said photographer Katarzyna Mazur , who spent months documenting the club in 2013 and 2014 . Led by founders nicknamed Anna Konda and Red Devil , a match might pit a bodybuilder against a martial arts master . They can wrestle , throw punches or `` cat fight . '' There 's no judge , just someone who knows the parameters they 've decided for the match . The small audience is mostly made up of men , but it 's a place for women to shed the roles they play outside . `` When I saw this kind of fighting for the first time , I was quite shocked . I had never seen something like that before , and it was really interesting to experience all of this so close , '' said Mazur , who photographed the fight club as part of her work toward graduation from photography school . `` Inhibition and fear do not exist on the mat . '' At first , Mazur said , she shot the fight club in color , but the look of the blue mat and neon lights did n't satisfy her . She shifted to black-and-white images and reduced her point of view , getting as close as she could to the action . `` It was not easy to work like that , because the matches were going very quickly and were unpredictable , '' she said , although fighters were respectful and would stop if someone was seriously hurt . `` I had to be very careful not to get hit . Fortunately , there are chairs on the side , so I could jump on them if the female fighters suddenly rolled under my feet . '' For all the aggression built into fighting , Mazur said , the project required a lot of sensitivity . She had to work quickly , and she did n't always know her subjects well . The bouts , the motivations , the scene can all leave a lot of room for interpretation . Mazur said she had to examine her own limitations , questioning `` How far can I go ? Do they trust me ? Am I allowed to do that ? '' Social media . Follow @ CNNPhotos on Twitter to join the conversation about photography . `` I enjoy exploring new worlds , especially a world which exists in a gray area , '' she said . She also had to remember that the fighters pushing and pummeling inside the club have lives outside , too -- they 're mothers , partners , friends . Their actions on the mat might contradict how they live the rest of their lives . Even years later , the fight club is still running and is `` better than ever , '' Mazur said . `` Very often , I was very moved after seeing and editing the pictures , realizing what exactly happened there , '' Mazur said . `` It is important to always remember my role as a photographer and to always approach the subject with interest and ( an open mind ) . '' Katarzyna Mazur is a Polish photographer based in Berlin . You can follow her on Facebook .
' Mazur spent months photographing a female fight ##fighter in 2006 . ` ` I enjoy exploring new worlds , especially a world which exists in a gray fog , '' Mazur said .