Therefore, the purpose of the current study was to compare maximal strength and hypertrophy responses to resistance training programs using constant rest intervals (CI) (2-min) and decreasing rest intervals (DI) (2-min decreasing BKM120 to 30-sec) between sets, during eight weeks of resistance training performed by trained men when supplementing with CR. Methods Subjects Twenty-two recreationally trained men were randomly assigned to a

constant rest interval group (CI; n = 11; 22.3 ± 1 years; 77.7 ± 5.4 kg; 180 ± 2.2 cm; 1.2 ± 0.22 bench press 1-RM/body mass; 1.42 ± 0.38 squat 1-RM/body mass) or a decreasing rest interval group (DI; n = 11; 22 ± 2.5 years; 75.8 ± 4.9 kg; 178.8 ± 3.4 cm 1.22 ± 0.26 bench press 1-RM/body mass; 1.45 ± 0.40 squat 1-RM/body mass). The inclusion criteria for participation were: a) minimum of one year resistance training experience at a frequency of four sessions per week; b) no medical conditions that could be aggravated by the training program;

and c) not using any substances that may allow for a performance advantage (i.e. anabolic-androgenic steroids, other ergogenic aids). The experimental procedures were approved by the Ethics Committee of the State University of Campinas (Unicamp) and informed consent was obtained selleck from all subjects. Additionally, subjects were asked not to perform any other structured exercise program throughout the duration of the study. Procedures Pre and post testing of dependent measures was conducted over two weeks. The 1-RM tests were performed on two non-consecutive days to Chlormezanone determine test-retest reliability. No exercise was allowed during the time between tests. The heaviest resistance lifted for the free weight back squat and bench press was considered the pre- and post-training 1-RM. These two exercises were used for strength assessment because they were common exercises performed by the subjects prior to participation in the study and the study training program utilized these two exercises. The 1-RM testing protocol has been described previously [16]. Briefly, a 1-RM was determined in fewer

than five attempts with a rest interval of 5-minutes between attempts. The bench press 1-RM was determined first and then a rest interval no shorter than 10-minutes was allowed before KU-57788 beginning the squat 1-RM assessment. Seventy-two hours later, muscle CSA was measured using magnetic resonance imaging. Immediately following the assessment of CSA, isokinetic peak torque was determined for the knee extensors and flexors. The test-retest reliability of the isokinetic tests was evaluated by retesting each subject six hours after the initial isokinetic test both pre- and post-training. Knee extensor and flexor isokinetic peak torque assessments were conducted using an isokinetic dynamometer (Cybex 6000 model, Division of Lumex, Inc. Ronkonkoma, NY, USA).