Özet:

Introduction: Strength Training (TF) has become one of the most popular exercise practices to improve physical fitness and performance. In the search for better results, High Intensity Interval Training (HIIT) associated with ST has been widely practiced. However, little is known about its influence on performance capacity when both are practiced in the same exercise session. Objective: to evaluate the effect of the rest interval after a HIIT session on muscle strength. Methods: Eight young men (25.6 ± 6.1 years), bodybuilders for at least 6 months participated in the study. Two randomized protocols with 72h intervals were performed. In protocol 1, the HIIT was performed and then repeated the 10RM test. In protocol 2, the HIIT was performed, given a rest of 30 minutes, and then performed the 10RM test. A significance level of p<0.05 was established. Results: The performance in the 10RM test in the 45th Leg Press was significantly lower when performed without rest (7 ± 3 repetitions). There was no significant difference for the chest press even without rest. When there was rest between exercises, there were no differences in performance in 10RM in both the ches press and the Leg Press 45º. Conclusion: HIIT in treadmill promotes a decrease in strength performance in the lower limbs, and this influence can be attenuated with at least a 30-minute interval between training sessions.

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