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Reliability of measurements with Innocor during exercise.

P Fontana1, U Boutellier, M Toigo

  • 1Exercise Physiology, Institute of Human Movement Sciences, ETH Zurich, Winterthurerstrasse 190, Zurich 8057, Switzerland. fontana@physiol.biol.ethz.ch

International Journal of Sports Medicine
|July 31, 2009
PubMed
Summary
This summary is machine-generated.

The Innocor system reliably measures cardiac output (CO), oxygen consumption, and ventilation during exercise. This tool is suitable for exercise physiology studies and performance diagnostics.

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Area of Science:

  • Exercise Physiology
  • Cardiovascular Function
  • Biomedical Engineering

Background:

  • Cardiac output (CO) is vital for cardiovascular function, especially during exercise.
  • Understanding CO regulation during physical activity is essential.
  • The Innocor system, combining rebreathing and ergospirometry, is a new tool for CO assessment.

Purpose of the Study:

  • To evaluate the test-retest reliability of the Innocor system.
  • To assess the reliability of cardiac output, oxygen consumption, carbon dioxide output, and ventilation measurements.
  • To determine the validity of Innocor for exercise physiology and performance diagnostics.

Main Methods:

  • 15 male and 15 female healthy participants underwent two test sessions.
  • Each session included two graded exercise tests to volitional exhaustion.
  • Intra- and inter-session reliability of CO, VO2, VCO2, and ventilation were measured at 130 W and peak exercise.

Main Results:

  • Cardiac output showed coefficients of variation from 4.3% (intra-session, 130 W) to 10.0% (inter-session, rest).
  • Oxygen consumption reliability ranged from 3.4% to 5.7%.
  • Carbon dioxide output and ventilation also demonstrated good reliability, with coefficients of variation below 7.0%.

Conclusions:

  • The Innocor system provides safe and reliable measurements of cardiac output, gas exchange, and ventilation during exercise.
  • The findings support the use of Innocor in exercise physiology research.
  • Innocor is a valuable tool for performance diagnostics in athletes and clinical populations.