The purpose of this study was to investigate the validity of different prediction equations to the one maximum repetition (1-RM) test at the bench press exercise (BP) with bar in mixed martial arts (MMA) athletes. The sample was composed by 19 male MMA athletes (27.68 ± 6.19 years). The data collection was performed in two different moments: 1) in 1-RM test; 2) in submaximal test and their respective numbers of repetitions. The paired-sample t test was performed and was noted that, among the six equations compared with the 1-RM test, only the Adams (p= 0.337) and O’Conner’s (p= 0.250) equations showed no significant differences. However, there were high Pearson correlation and intraclass correlation coefficients (r= 0.924, ICC= 0.924; r= 0.944, ICC= 0.944), respectively. Nevertheless, all equations showed high correlations that ranged between 0.854 and 0.944. In conclusion, for estimation of 1-RM, the predictive equations based on Adams and O'Conner’s are valid in MMA athletes.
