The 31-year-old Albuquerque boxer announced last month that she was retiring from boxing to dedicate herself to mixed martial arts.
Holm told the Albuquerque Journal that she's received a lot of negative reaction from boxing fans about her decision. But Holms says she's "not going to lose sleep over it."
Holm is a multiple-time, three-division world champion in boxing and has a 32-2-3 boxing record. She is 3-0 in MMA bouts.
She trains at Albuquerque's Jackson Mixed Martial Arts, a gym that has sent a number of fighters to the UFC.