Acute physiological responses in different recovery intervals between series of leg press 45?.

O objetivo do presente estudo foi comparar as respostas fisiol?gicas agudas da frequ?ncia card?aca (FC), press?o arterial sist?lica (PAS), duplo produto (DP), ?ndice de perce??o de esfor?o (IPE) e lactato sangu?neo (LA) no exerc?cio resistido (ER) entre um e dois minutos de intervalo de recupera??o entre s?ries de exerc?cios. A amostra foi composta por 12 homens universit?rios volunt?rios, aparentemente saud?veis, com idade entre 20 a 32 anos (24.6 ? 3.7 anos de idade; massa corporal 71.3 ? 8.7 kg; estatura 178 ? 5.6 cm; gordura corporal 11.5 ? 4.5%). Todos os participantes foram submetidos ao teste de uma repeti??o m?xima (1-RM) no exerc?cio leg press 45?. Foram realizadas tr?s s?ries de dez repeti??es a 60% de 1-RM no leg press 45?. Apenas o LA e a FC n?o apresentaram diferen?as significativas entre 1 e 2 minutos. Analisando o efeito das s?ries subsequentes, a FC, PAS, DP e IPE foram significativamente maiores (p ? .05) na 3?, 2? e 1? s?ries, respetivamente. Menor intervalo de recupera??o entre as s?ries (um minuto) proporciona maior sobrecarga cardiovascular aguda (PAS e DP) em rela??o a um intervalo maior (dois minutos) no ER de membro inferior em jovens universit?rios.The aim was to compare the acute physiological responses of cardiac frequency (CF), systolic blood pressure (SBP), double product (DP), perception of strain index (PSI) and blood lactate (BL) in resistance exercise (RE) between one and two minutes of recovery interval among exercise sets. The sample was composed by 12 voluntary male college students, apparently healthy, with ages between 20 and 32 years (24.6 ? 3.7 years of age; body mass 71.3 ? 8.7 kg; stature 178 ? 5.6 cm; body fat 11.5 ? 4.5%). All participants were submitted to the maximum repeat test (1-RM) on the leg press 45? exercise. Three sets of ten repetitions at 60% of 1-RM in the leg press 45? exercise were performed. Results indicated that only the BL and the CF did not show significant differences between one and two minutes. Analyzing the effect of subsequent sets, the CF, SBP, DP and PSI were significant superior (p ? .05) in the 3rd, 2nd and 1st sets, respectively. In conclusion, minor interval of recovery among the sets (one minute) provides greater acute cardiovascular overload (SBP and DP) in relation to a major interval (two minutes) on the RE of the inferior members of young college students