Resposta metabólica e ventilatória no exercício contínuo de alta intensidade versus intervalado de alta intensidade em corredores de fundo

Abstract

Introduction: The ventilatory and metabolic responses to exercise seem to differ in high intensity interval training (HIIT) and high intensity continuous training (HICT). It is known that high intensity interval training has high intensity peaks, which could increase respiratory and metabolic work, unlike high intensity continuous training. Objective: To compare the metabolic and ventilatory behavior between high intensity interval training and high intensity continuous training in high performance athletes. Methods: Ten male subjects participated of the research, of 16 to 35 years old, with experience in long distance running, who practiced in interval training and continuous training, and performed aerobic exercise at least three times a week. Four visits were realized, the first one for familiarization, teaching and performing the maximal ergospirometric test for the determination of the exercise speed in the subsequent visits, the second and the third for the application of the HIIT protocol, with stimuli of a min. to 110% of vVO2max intercalated with a min. to 60% of the related speed to VO2max (vVO2max), or HICT to 85% of vVO2max, and the fourth for collection of maximal voluntary ventilation (VVM). Both exercise protocols had the same heating, cooling, duration time of 14 min. and the same average intensity. Results: Average values HIIT versus HICT - VO2 values: 55.6 ± 5.6 vs 53.9 ± 5.9 ml/ kg/min; VE: 134.1 ± 21.5 * vs 111.9 ± 21.8 L/min; VCO2: 3690.2 ± 546.3 * vs 3314.0 ± 545.1 ml/min; VC: 2.4 ± 0.4 * vs 2.2 ± 0.3 L; f: 56.5 ± 7.7 * vs 50.7 ± 5.2 irpm. Conclusion: Even though the exercises are equal in relation to VO2, HIIT stimulates the ventilatory system more, with higher values of VE, VC and f, getting closer to the maximum ventilatory capacity (VVM), with higher VCO2 than in HICT.