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Background: Trained subjects have difficulty in achieving continued results following years of training, and the manipulation of training variables through advanced resistance training (RT) methods is widely recommended to break through plateaus. Objective: The purpose of the present study was to compare the acute effects of traditional RT (TRT) versus two types of sarcoplasma stimulating training (SST) methods on total training volume (TTV), lactate, and muscle thickness (MT). Methods: Twelve trained males (20.75 ± 2.3 years; 1.76 ± 0.14 meters; body mass = 79.41 ± 4.6 kg; RT experience = 4.1 ± 1.8 years) completed three RT protocols in a randomly sequenced order: TRT, SST contraction type (SST-CT), or SST rest interval variable (SST-RIV) with 7 days between trials in arm curl (elbow flexors) and triceps pulley extension (elbow extensors) performed on the same day. Results: The SST groups displayed greater acute biceps and triceps brachii (TB) MT versus the TRT session, with no difference in lactate levels between them. The SST-CT resulted in greater biceps and TB MT versus the SST-RIV session. The TTV was greater for the TRT session versus the SST sessions, except in the case of the elbow flexors (no difference was observed between TRT and SST-CT), and higher for the SST-CT versus the SST-RIV. Conclusion: Trained subjects may benefit from using the SST method as this method may offer a superior MT stimulus and reduced training time, even with a lower TTV.

The aim of this study was to investigate the effect of post-activation potentiation (PAP), carbohydrate (CHO) mouth rinse, and the combination of both strategies on repeated sprint ability (RSA). Twenty male soccer players (age = 18.9 ± 0.9 years, body mass = 71.8 ± 5.2 kg, height = 178.2 ± 6.3 cm) randomly performed four experimental conditions before RSA test (six sets of 40 m): (I) placebo (PLA) control, (II) CHO mouth rinse (6% maltodextrin), (III) PAP + PLA, and (IV) PAP + CHO. The PAP protocol involved two sets of five repetitions (80% 1RM) of the back squat exercise. A one-way repeated measures analysis of variance followed by Bonferroni post hoc test was used to compare the experimental conditions. Results indicated that PAP + CHO and PAP + PLA had better results for the variables best sprint time, mean sprint time, and total sprint time compared with CHO and PLA (p<0.001; small effect size). No significant interaction between the experimental conditions was observed for the variable RSA performance decrement, and no significant difference between conditions, i.e., PAP + CHO vs. PAP + PLA and CHO vs. PLA control was found. In conclusion, PAP positively affects RSA performance in soccer players; however, the combination of PAP and

IntroduçãoO treinamento de força é conhecido como um método efetivo para a melhora da capacidade do sistema neuromuscular, sendo que a ma nutenção e/ou aumento da força muscular geram resultados benéficos nos mais diferentes aspectos da qualidade de vida (DESCHENES; KRAEMER, 2002; KRAEMER; RATAMESS, 2004.A variação hormonal observada durante o ciclo menstrual de mu lheres em que se observa alternância nas concentrações de estrógeno e progesterona representa um importante aspecto a ser controlado em Resumo O objetivo deste estudo foi avaliar a influência do ciclo menstrual sobre a perfor mance de força muscular. Vinte mulheres treinadas e usuárias de contraceptivos participaram como voluntárias. O treinamento durou 26 dias (12 sessões segunda, quarta e sexta) e envolveu apenas o exercício supino reto (6 séries de 10 repetições a 80% de 1RM e pausas de 60 segundos entre series). Para comparação da perfor mance muscular, foi considerado o volume total de carga levantada (séries x repe tições x carga) das sessões referentes: 1°e 3°dia (fase folicular), 8°e 12°dia (fase ovulatória), 15°e 26°dia (fase lútea). Nossos resultados mostraram redução signi ficativa no volume total de carga apenas na fase folicular. Em conclusão, fase foli cular influenciou no desempenho da força muscular. Palavraschave: Ciclo Menstrual. Força Muscular. Treinamento de Resistência.