Second Ventilatory Threshold Assessed by Heart Rate Variability in a
Multiple Shuttle Run Test

Dimitrios C. Stergiopoulos; Stylianos N. Kounalakis; Panagiotis G. Miliotis; Nikolaos D Geladas

doi:10.1055/a-1214-6309

International Journal of Sports Medicine, Inhaltsverzeichnis

Int J Sports Med 2021; 42(01): 48-55
DOI: 10.1055/a-1214-6309

Physiology & Biochemistry

Second Ventilatory Threshold Assessed by Heart Rate Variability in a Multiple Shuttle Run Test

Authors

Dimitrios C. Stergiopoulos

¹School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Athinon, Greece
Stylianos N. Kounalakis

²Faculty of Physical and Cultural Education, Evelpidon Military Academy, Vari, Greece
Panagiotis G. Miliotis

¹School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Athinon, Greece
Nikolaos D Geladas

¹School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Athinon, Greece

Abstract

Many studies have focused on heart rate variability in association with ventilatory thresholds. The purpose of the current study was to consider the ECG-derived respiration and the high frequency product of heart rate variability as applicable methods to assess the second ventilatory threshold (VT₂). Fifteen healthy young soccer players participated in the study. Respiratory gases and ECGs were collected during an incremental laboratory test and in a multistage shuttle run test until exhaustion. VΤ₂ was individually calculated using the deflection point of ventilatory equivalents. In addition, VT₂ was assessed both by the deflection point of ECG-derived respiration and high frequency product. Results showed no statistically significant differences between VT₂, and the threshold as determined with high frequency product and ECG-derived respiration (F(2,28)=0.83, p=0.45, η²=0.05). A significant intraclass correlation was observed for ECG-derived respiration (r=0.94) and high frequency product (r=0.95) with VT₂. Similarly, Bland Altman analysis showed a considerable agreement between VT₂ vs. ECG-derived respiration (mean difference of −0.06 km·h⁻¹, 95% CL: ±0.40) and VT₂ vs. high frequency product (mean difference of 0.02 km·h⁻¹, 95% CL: ±0.38). This study suggests that, high frequency product and ECG-derived respiration are indeed reliable heart rate variability indices determining VT₂ in a field shuttle run test

Key words

anaerobic threshold - exercise - sympathetic - parasympathetic - autonomic nervous system - heart rate

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Referenzen

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