A single session of testing for one repetition maximum (1RM) with eight exercises is trustworthy

Although the 1RM test is used as the gold standard for assessing muscle strength in non-laboratory situations, the question is this: "Are the 1RM values performed in a single exercise session with 8 exercises trustworthy?" Sixteen male subjects (mean ± SEM: age 27.3 [+ or -] 1.0 yrs; height, 179.1 ± 1.8 cm; body mass, 89.3 ± 2.9 kg; body mass index 27.8 ± 0.6 kg x [m.sup.-2]; and fat percentage 18.7 [+ or -] 1.5%) participated in this study. They completed two 1RM test sessions with 8 exercises. Session one (T-1RM): leg press, bench press, squat, front pulldown, leg curl machine, pushdown on a cable machine, leg extension machine, biceps barbell curl. Session two (RT-1RM) inverse order of the exercises was used, starting with the weight of 1RM found on the first test (T-1RM). Six blood samples were collected to analyze blood lactate concentration. The results of this study demonstrated the reliability of 1RM test in a single session with 8 exercises. A high intraclass correlation coefficient was also found (ranging from 0.911 to 0.993). The findings indicate that a single 1RM test session with 8 exercises is a reliable test without the need for a second session to confirm the previous values. Key Words: Resistance Training, Lactic Acid, Training Intensity