Relationship between Repetitions and Selected Percentage of One Repetition Maximum in Trained and Untrained Adolescent Subjects

ABSTRACT Moraes E, Alves HB, Teixeira AL, Dias MR, Miranda H, Simao . Relationship between Repetitions and Selected Percentage of One Repetition Maximum in Trained and ntrained U Adolescent Subjects. JEPonline 2014;17(2):27-35. This study compare 7 dmales with experience in resistance training(trained group: 14.4 ± 1.3 yrs) to 10 males with no prior experience (untrained group: 14.6 ± 0.8 yrs). The subjects performedmaximum repetitions at80% of one repetition maximum (1RM) until concentric fatiguein the bench press (BP), the lat pull-down (LPD), and the 45o leg press (LP) resistance exercises. The number of repetitions achieved during the LP was greater than during the in both groups (P≤0.05). LPD The number of repetitions for the LP and the LPD were greaterthan during the BP in both groups (P≤0.05). The number of repetitions was greater in the trained group vs. the untrained group in both the LP and the LPD exercises (P≤0.05). There was no significant difference betweenthe groups (P≥0.05) during the BP exercise. The findings indicate that the number of repetitions achieved at 80% of 1RM in trained and untrained adolescent subjects vary with different resistance exercises. Key Words: Muscle Strength, Resistance Training, Adolescent Subjects