Please find below the abstract of the article entitled “Time to exhaustion at maximal lactate steady state continuous and intermittent during running exercise”, which was written in English by Naiandra Dittrich, Ricardo Dantas de Lucas, Ralph Beneke and Luiz Guilherme Antonacci Guglielmo, and published in International Journal of Sports Physiology and Performance

“The purpose of this study was to determine and compare the time to exhaustion (TE) and the physiological responses at continuous and intermittent (ratio 5:1) maximal lactate steady state (MLSS) in well trained runners. Ten athletes (32.7 ± 6.9 years; VO2max 61.7 ± 3.9 mL•kg-1•min-1) performed an incremental treadmill test, three to five 30-min constant speed tests to determine the MLSS continuous and MLSS intermittent (5 min of running, interspaced by 1 min of passive rest) and two randomized TE tests at such intensities. Two-way ANOVA with repeated measures was used to compare the changes in physiological variables during the TE tests and between continuous and intermittent exercise. The intermittent MLSS velocity (MLSSint = 15.26 ± 0.97 km.h-1) was higher than in the continuous model (MLSScon = 14.53 ± 0.93 km.h-1), while the time to exhaustion at MLSS continuous was longer than MLSS intermittent (68 ± 11 min and 58 ± 15 min, p<0.05). Regarding the cardiorespiratory responses, VO2 and R remained stable during both TE tests while HR, VE and RPE presented a significant increase in the last portion of the tests. The results showed a higher tolerance to exercising during continuous MLSS compared to intermittent MLSS, in trained runners. Thus, the training volume of an extensive interval session (ratio 5:1) designed at MLSS intensity should take into consideration this higher speed at MLSS and also the lower TE, when compared with continuous exercise.”

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