Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2014 ) 13 , 309 - 314

Research article
A Simplified Approach for Estimating the Ventilatory and Respiratory Compensation Thresholds
Giancarlo Condello1, , Ezekiel Reynolds2, Carl Foster2,3,, Jos J. de Koning2,3, Erika Casolino1, Megan Knutson2, John P. Porcari2
Author Information
1 Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Italy
2 Department of Exercise and Sport Science, University of Wisconsin-La Crosse, USA
3 MOVE Research Institute Amsterdam, Faculty of Human Movement Sciences, VU University-Amsterdam, Netherlands

Giancarlo Condello
✉ Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Italy
Email: giancarlo.condello@gmail.com
Publish Date
Received: 14-10-2013
Accepted: 17-12-2013
Published (online): 01-05-2014
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ABSTRACT

This study aimed to investigate whether ventilatory (VT) and respiratory compensation (RCT) thresholds could be derived from percentages of maximal running speed (Vmax). During the model building phase (1), VT & RCT of 31 competitive level athletes were identified with respiratory gas exchange. During the cross-validation phase (2), 20 subjects performed a treadmill test to identify Vmax and then they performed 30-min runs at velocities 2SE below or above the velocity at VT and RCT derived from (1), with measurement of blood lactate [BL], RPE, heart rate (HR), and speech comfort. Phase (1) revealed that VT and RCT were reached at 67 ± 9% and 84 ± 6% of Vmax. In (2) sustained running 2SE below VT (64% Vmax) was associated with the ability to finish 30-min, with low and constant [BL] (~2.5 mmol.l-1), moderate RPE (~3.0-3.5), a small HR drift, and ability to speak comfortably. Conversely, running at 2SE above RCT (86% Vmax) was associated with the inability to finish 30-min (18.5 ± 2.5 min to fatigue), increasing [BL] (end-exercise = 11.9 ± 0.9 mmol.l-1), high RPE (end-exercise = 8.9 ± 1.0), large HR drift (end-exercise = 98 ± 3% HRmax), and inability to speak comfortably. Simple percentages of Vmax (≤64% and ≥86%) obtained from a treadmill test without gas exchange, may be useful for prescribing exercise training intensities.

Key words: Running, maximal running speed, maximal lactate steady state


           Key Points
  • Simple performance parameters can be used to provide indications of physiologic thresholds.
  • 64% and 86% of the maximal running speed produce conditions consistent with ≤VT and ≥RCT.
  • The combination of technology free feedback techniques such as the Talk Test and RPE and the simple %Vmax can be used as available and easy methods for the performance evaluation.
  • Training prescription can be better addressed to the improvement of the aerobic or anaerobic capacity.
 
 
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