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SILVA, N. R. Acute effect of aerobic exercise with different volumes on strength performance in physically active individuals. 2015. 56 f. Dissertação (Mestrado em Ciências) – Escola de Educação Física e Esporte, Universidade de São Paulo, São Paulo. 2015. Concurrent training (CT) is frequently utilized by physically active individuals and athletes in order to develop muscle strength and aerobic fitness. However, this training strategy may result in attenuation of the gains on strength and muscle hypertrophy in long term. This effect has been referred to as the interference phenomenon. There are indications that the magnitude of this interference may be dependent on the volume that aerobic exercise is performed. Thus, the aim of the present study was to verify the effect of aerobic exercise performed with different volumes on the acute performance of lower limbs maximum strength and strength endurance. Physically active men (n=21) were submitted to six experimental conditions performed in random order, three aerobic exercise sessions with different volumes (3km, 5km and 7km) followed by the maximum dynamic strength (1RM) test and three aerobic exercise sessions with different volumes followed by strength endurance test (4 sets of maximum repetitions at 80% 1RM). The aerobic exercise was a continuous treadmill run at 90% of the anaerobic threshold (AT) and all strength tests were performed in the leg press 45. A mixed-model was performed with the volumes of aerobic exercise as a fixed factor and subject as a random factor to compare 1RM values and total volume (TV) of the strength training (ST) session. Post-hoc tests with Tukey adjustments were used for multiple comparisons. The significance level adopted was 5%. No differences were observed in 1RM values among conditions. The TV of the 5km and 7km conditions were lower when compared to the control condition. The TV of the 7km condition was lower than the 3km and 5km conditions. No differences were observed in TV between the 3km and control conditions and between the 3km and 5km conditions. In conclusion, strength endurance performance was impaired when performed after aerobic exercise and the magnitude of this interference depended on the volume of the aerobic exercise. In addition, maximum dynamic strength performance was not affected by prior execution of aerobic exercise. Key-words: Concurrent training; maximum strength; strength endurance.

Efeito agudo do exercício aeróbio com diferentes volumes no desempenho de força em indivíduos fisicamente ativos