AUTHOR=Manoel Francisco de Assis , Peserico Cecília Segabinazi , Machado Fabiana Andrade 

TITLE=Reliability of Peak Running Velocity Obtained on the Track Field in Runners of Different Performance Levels

JOURNAL=Frontiers in Physiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2021.680913

DOI=10.3389/fphys.2021.680913

ISSN=1664-042X

ABSTRACT=<p>The aim of this study was to verify the reliability of peak running velocity obtained on the track field (V<sub>peak_TF</sub>) in runners of different performance levels. 39 male endurance runners were divided into two groups: trained runners (TR; <italic>n</italic> = 22; 10-km time running performance of 35.2 ± 1.7 min), and recreational runners (RR; <italic>n</italic> = 17; 10-km time running performance of 51.3 ± 4.8 min). They performed three maximal incremental running tests on the official track field (400 m), with an interval of 1 week between trials to determine the reliability of V<sub>peak_T</sub>. The V<sub>peak_TF</sub> showed high reliability, presenting an intraclass correlation coefficient and coefficient of variation of 0.97 and 1.28%, and 0.90 and 1.24% for TR and RR, respectively. Both TR and RR showed lowest bias and limits of agreement between test and retest (V<sub>peak_TF1</sub> and V<sub>peak_TF2</sub>). In addition, there was no statistical test-retest difference for V<sub>peak_TF</sub>. In addition, the HR and RPE submaximal values were reliable for both TR and RR. Therefore, the V<sub>peak_TF</sub> showed high reliability in both TR and RR. These findings reinforce that the protocol for determining V<sub>peak_TF</sub>, using increments of 1 km h<sup>–1</sup> every 3 min is reliable regardless of the performance level of the runners.</p>