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Int J Sports Med 2018; 39(04): 304-313
DOI: 10.1055/s-0043-122741
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Perceptually Regulated Exercise Test Allows Determination of V˙O2max and Ventilatory Threshold But Not Respiratory Compensation Point In Trained Runners

Perrine Truong
1   University of Lausanne, Faculty of Biology and Medicine, Lausanne, Switzerland
,
Gregoire P. Millet
2   University of Lausanne, Institute of Sport Sciences ISSUL, Faculty of Biology and Medicine, Lausanne, Switzerland
,
Boris Gojanovic
3   Hopital de la Tour, Swiss Olympic Medical Center, Meyrin, Switzerland
4   Swiss Federal Institute for Sport (BASPO), Magglingen, Switzerland
5   Sports Medicine Unit, Department of Human Locomotion, Lausanne University Hospital CHUV, Lausanne, Switzerland.
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accepted 24. Oktober 2017

Publikationsdatum:
23. Februar 2018 (online)

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Abstract

This study aimed to investigate the differences in maximal oxygen uptake (V̇O2max) and submaximal thresholds between a standard graded exercise test (GXT) and a perceptually regulated graded exercise test (PRGXT) in trained runners. Eleven well-trained middle- to long-distance runners performed both tests in a randomized order. PRGXT used incremental “clamps” of rating of perceived exertion (RPE) over 10×1-min stages on an automated treadmill equipped with a sonar sensor allowing them to change their running speed instantly and in a natural way. GXT used fixed 1 km.h−1 increment every minute. Ventilatory threshold (VT) and respiratory compensation point (RCP) were determined using ventilatory equivalents. No differences were found in V̇O2max (68.0 (5.3) vs. 69.5 (5.9) ml·min−1·kg−1, p=0.243), minute ventilation (V̇E) (159.4 (35.0) vs. 162.4 (33.7) l·min−1, p=0.175), heart rate (HR) (188.4 (6.9) vs. 190.7 (5.2) bpm, p=0.254) and speed (21.0 (1.7) vs. 21.1 (2.3) km·h-1, p=0.761) between GXT and PRGXT. At VT, there were no significant differences between GXT and PRGXT for any outcome variables. For 8 of 11 subjects, it was not possible to determine RCP from ventilatory equivalent in PRGXT. GXT appears more relevant for a comprehensive gas analysis in trained runners.

Key words

maximal oxygen consumption - pacing - rating of perceived exertion - automated treadmill - respiratory compensation point
 

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