Subjects
Eleven men (24.0 ± 4.8 yr; 76.1 ± 8.5 kg; 175 ± 5cm) with at least 6 months of uninterrupted recreational resistance training experience participated as volunteers in this study.
Th experimental approach had institutional ethical board approval, and all subjects signed the informed consent form before participation in the study.
Th inclusion criteria for participation were the following: (a) being male between 18 and 28 years of age, (b) being classifid as able to practice physical activities by the Physical Activity Readiness Questionnaire–PAR-Q24, and (c) being free of clinical problems that could be aggravated by the protocol, not smoker, and with at least 6 months of uninterrupted resistance training experience, practicing one hour at least three times a week, and with no experiences on the circuit training method.
Subjects were excluded from the study if they (a) did any type of exercise 48h prior to the experimental session, (b) used drugs or nutritional supplements during the experimental period, (c) consumed alcohol 48h prior to any session, or (d) missed any session.
Subjects’ characteristics are presented in Table 1.
According to norm 196/96 of the Brazilian National Health Council, all participants read and signed the informed consent form before undergoing the study procedures, and the study protocol was approved by the Ethics Committee of the Federal University of Pernambuco.