Aim:The use of standard strength tests as a means of assessing maximum strength is extremely important when resistance training is planned on an individual basis. This study aimed to estimate one repetition maximum (1RM) of healthy males based on the Rating of Perceived Exertion in chest press movement and to provide a special predictive equation. Methods:An initial sample of 70 healthy men were randomly selected from 10 sports clubs with a six-month training history (age: 24.93-0.64 years; body mass index: 25.4-0.35 kg/m2). In this study, the subjects performed three separate one-repetition maximum tests (Brzeski test on the first day, standard test on the second day, and pressure perception test on the third day) over an interval of 24 hours. Following the collection of data related to maximum repetition in the first two tests, a percentage of the maximum repetitions was randomly selected and the subjects repeated the maximum repetitions with their eyes closed while assigning a score from 0 to 10 based on their understanding and assignment of intensity. A predictive equation was developed based on data related to RPE.Results:Brzycki equations and standard protocol did not differ significantly with RPE-equation in predicting 1 RM (p>0. 05). Based on the Brzycki equation and standard protocol, a 1RM attempt for inexperienced males resulted in 73. 99±7. 26 kg and 77. 50±10. 37 respectively, while the RPE equation produced 77. 85 ± 8. 59 kg. There were significant results for linear regression (p=0. 001). Pearson correlation coefficients between Brzycki and standard protocol with predicted 1-RM were 0. 961 and 0. 962, respectively. Conclusion:The new method of 1RM based on RPE performed well in 1RM performance in inexperienced individuals' males, and it appeared safe, accurate, and time-effective.