Abstract
High-Intensity Interval Training (HIIT) is described as a succession of short duration and maximum or near-maximum intensity efforts, alternated by recovery periods during which exercise continues at a lower intensity (active recovery) or is interrupted (passive recovery). Our objective was to evaluate the acute responses of three HIIT protocols of different work/rest interval times over the total time of the session, with self-selectable load and up to exhaustion, “all out”.The sample was composed of 22 male participants (n = 22) between 19 and 24 years old. The HIIT protocol consisted of one of the three HIIT protocols, of 30, 60 and 90 s density ratio 1:1 and with passive rest, with a total exercise duration of 10 min. The test was performed in a cycloergometer set in workload mode independent of the pedaling frequency. The comparison of the three HIIT protocols shows that the duration of the work/rest intervals, starting from 30 s of work, in the cycloergometer, there are no significant differences in the levels of lactate concentration in the blood, nor in the heart rate, since a similar amount is obtained in the three protocols. The percentage of maximum power developed reached in each HIIT protocol is related to the duration of the working intervals.
Highlights
Published: 16 April 2021High-intensity interval training (HIIT) is a training method currently considered one of the most effective in improving cardiorespiratory and metabolic function [1]
According to Seiler [7] the intensity of exercise can be divided into three zones: exercise intensity zone 1, which corresponds to an intensity with minimal accumulation of lactate in the blood, zone 2, which corresponds to an intensity with accumulation of lactate in Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
In the results obtained in the physical control measurements, in blood lactate concentration level, no significant differentiation was observed when the lactic acid concentration was compared at the three protocols (F = 1000; p = 0.337; ηp2 = 0.031)
Summary
Published: 16 April 2021High-intensity interval training (HIIT) is a training method currently considered one of the most effective in improving cardiorespiratory and metabolic function [1]. HIIT can be defined as repeated bouts of high intensity exercise, from a maximum lactate steady state (MLSS) respiratory compensation point (CPR) to a total supramaximal exercise intensity, interspersed with periods of recovery from low or moderate intensity exercise (active recovery) or complete rest [2]. Due to these recovery phases, peak workloads can be sustained for a longer cumulative period than in a period of continuous exercise [3]. According to Seiler [7] the intensity of exercise can be divided into three zones: exercise intensity zone 1, which corresponds to an intensity with minimal accumulation of lactate in the blood, zone 2, which corresponds to an intensity with accumulation of lactate in Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
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