It's a bit of a cliché for fighters to say they are coming into their next fight "a better version of themselves," but in the case of Joanna Jedrzejczyk, it's probably best worth believing.Undefeated in 12 professional fights, some fighters may have believed that it would have been unwise to make any significant changes to their fight camp preparations but not Jedrzejczyk.[instagram url="https://www.instagram.com/p/BMZlkmqjmU0/?hl=en" hide_caption="0"]Having said many times in the past few weeks that we will be seeing a "new Joanna" in New York City on Saturday, Nov. 12, the UFC strawweight champion elaborated on what she meant to SportsNet earlier this week and highlighted her new partnership with sports nutrition company Perfecting Athletes."We were trying to work together for a long time, but I had a good relationship with my old nutritionist," said Jedrzejczyk, who faces fellow Poland native Karolina Kowalkiewicz at UFC 205 . "Sometimes you are in a personal relationship with someone and you think everything is perfect and that you don't want to leave this person but it isn't good. Sometimes we fighters must do what Chris Weidman said and be selfish. We must think about ourselves and our job."The thing is there are so many people that are working towards my success--my doctors, my nutritionist, my coaches, my sparring partners, my agents, and my managers. The thing is though, on the day of the fight there is only me and my opponent you know. [Therefore] before the fight, I need to make sure that everything is good, and everyone is doing a good job for me."Jedrzejczyk then highlighted some of the benefits she'd seen since changing her nutritionist and said that she'd been much happier with her preparations during fight week."I feel the difference already," Jedrzejczyk said. "I feel the difference since working with Perfecting Athletes. My body has changed, I'm more strong, and I feel great at the weigh-ins, and the weight cuts are going smooth and easy. They are the best people in the business probably."Like I said, I'm an athlete. I'm thinking about my future, and I want to be a good partner in the future and be a mom with some good businesses. I must think about my future life, and I must be safe today."One of the other big changes Jedrzejczyk made was to move training camps to work at American Top Team in Coconut Creek, Florida.Having now been through the whole of her UFC 205 camp, the Pole confirmed that she now felt part of the team and that she would return there in 2017."I'm very happy I made this decision," Jedrzejczyk said. "I spent seven weeks at ATT with Mikey Brown and all the other top coaches. The facilities are very nice, top level coaches, top level fighters and sparring partners. It's a great place to be for every athlete and every champion."I will be back; it's my second home. I'm Polish so after the fight I will fly back home and spend some time with my family for Christmas, but in January I will go back to American Top Team."