AUTHOR=Delevatti Rodrigo S. , Kanitz Ana Carolina , Alberton Cristine L. , Marson Elisa Corrêa , Pantoja Patricia Dias , Pinho Carolina DertzbocherFeil , Lisboa Salime Chedid , Kruel Luiz Fernando M. 

TITLE=Glycemic Threshold as an Alternative Method to Identify the Anaerobic Threshold in Patients With Type 2 Diabetes

JOURNAL=Frontiers in Physiology

VOLUME=9

YEAR=2018

URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2018.01609

DOI=10.3389/fphys.2018.01609

ISSN=1664-042X

ABSTRACT=<p><bold>Purpose:</bold> To analyze the agreement between the velocity, heart rate, and oxygen uptake values corresponding to second ventilatory threshold and glycemic threshold in patients with type 2 diabetes.</p><p><bold>Methods:</bold> Twenty-four untrained patients (55.1 ± 8.9 years) were evaluated. Three different parameters of training intensity corresponding to anaerobic threshold, one mechanical (velocity) and two physiological (heart rate and oxygen uptake) parameters, were identified by a classical method (second ventilatory threshold) and by an alternative method (glycemic threshold). To determine the threshold values, patients performed an incremental treadmill test, with an initial velocity of 3 km.h<sup>-1</sup> for 3 min, that was then increased by 1 km.h<sup>-1</sup> every 2 min. Comparisons between mean values and the degree of agreement between second ventilatory threshold and glycemic threshold were analyzed using the paired <italic>t</italic>-test and Bland-Altman test, respectively.</p><p><bold>Results:</bold> All patients performed the tests appropriately, and no adverse effects were recorded. Patients demonstrated similar mean velocity (<italic>p</italic> = 0.25), heart rate (<italic>p</italic> = 0.97) and oxygen uptake (<italic>p</italic> = 0.71) between the ventilatory threshold (6.4 ± 0.6 km.h<sup>-1</sup>, 130.1 ± 18.7 bpm, 15.2 ± 3.5 ml.kg.min<sup>-1</sup>) and the glycemic threshold (6.2 ± 0.9 km.h<sup>-1</sup>, 130.2 ± 12.8 bpm, 15.0 ± 3.8 ml.kg.min<sup>-1</sup>).</p><p><bold>Conclusion:</bold> The present study indicates an agreement between the glycemic and second ventilatory methods in determination of the anaerobic threshold of patients with type 2 diabetes; and thus, either method may be used for these patients.</p>