The characterization of the transit through the anaerobic threshold based on relationships between RR and QRS cardiac intervals

PLoS One. 2019 May 15;14(5):e0216938. doi: 10.1371/journal.pone.0216938. eCollection 2019.

Abstract

This paper aims to develop a novel computational technique for the detection of the transit through the anaerobic threshold. This technique uses only cardiac intervals derived from the electrocardiogram and is based on algebraic relationships between RR and QRS intervals. Electrocardiograms are measured during the load and the recovery processes. Algebraic relationships between cardiac intervals are used not only to identify the anaerobic threshold but also to characterise individual features of the person during the transit through the threshold. The ratio between carbon dioxide and oxygen in the exhaled air is used to validate the results. The algebraic relationship between cardiac intervals serves as a stand-alone indicator for both the determination of the anaerobic threshold and the characterization of the performance of the person during the load and the recovery processes.

MeSH terms

  • Adult
  • Algorithms*
  • Anaerobic Threshold / physiology*
  • Carbon Dioxide / physiology
  • Electrocardiography / statistics & numerical data*
  • Exercise Test
  • Exhalation / physiology
  • Healthy Volunteers
  • Heart / physiology*
  • Heart Rate / physiology
  • Humans
  • Male
  • Middle Aged
  • Oxygen / physiology

Substances

  • Carbon Dioxide
  • Oxygen

Grant support

The authors received no specific funding for this work.