Estimation of oxygen uptake during fast running using accelerometry and heart rate.

Détails

ID Serval
serval:BIB_37EF5D94D4B6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Estimation of oxygen uptake during fast running using accelerometry and heart rate.
Périodique
Medicine and Science in Sports and Exercise
Auteur(s)
Fudge B.W., Wilson J., Easton C., Irwin L., Clark J., Haddow O., Kayser B., Pitsiladis Y.P.
ISSN
0195-9131 (Print)
ISSN-L
0195-9131
Statut éditorial
Publié
Date de publication
2007
Volume
39
Numéro
1
Pages
192-198
Langue
anglais
Résumé
Previous investigations have reported that accelerometer counts plateau during running at increasingly faster speeds.
PURPOSE: To assess whether biomechanical and/or device limitations cause this phenomenon and the feasibility of generating oxygen uptake (.VO2) prediction equations from the combined use of accelerometry and heart rate during walking and running.
METHODS: : Sixteen endurance-trained subjects completed two exercise tests on a treadmill. The first was a continuous incremental test to volitional exhaustion to determine ventilatory threshold and peak .VO2. The second was a discontinuous incremental exercise test while walking (3, 5, and 7 km.h(-1)) and running (8, 10, 12, 14, 16, 18, and 20 km.h(-1), or until volitional exhaustion). Subjects completed 3 min of exercise at each speed, followed by 3-5 min of recovery. Activity counts from uni- and triaxial accelerometers, heart rate, and gas exchange were measured throughout exercise.
RESULTS: All accelerometer outputs rose linearly with speed during walking. During running, uniaxial accelerometer outputs plateaued, whereas triaxial output rose linearly with speed up to and including 20 km.h(-1). Prediction of .VO2 during walking and running using heart rate (R2 = 0.42 and 0.59, respectively), accelerometer counts (R2 = 0.48-0.83 and 0.76, respectively), the combined methodologies (R2 = 0.54-0.85 and 0.80, respectively), and the combined methodologies calibrated with individual data (R2 = 0.99-1.00 and 0.99, respectively) was completed by linear regression.
CONCLUSIONS: Uni- and triaxial accelerometer outputs have a linear relationship with speed during walking. During running, uniaxial accelerometer outputs plateau because of the biomechanics of running, whereas triaxial accelerometer output has a linear relationship. The combined methodologies predict .VO2 better than either predictor alone; a subject's individually calibrated data further improves .VO2 estimation.
Mots-clé
Acceleration, Adult, Heart Rate/physiology, Humans, Male, Monitoring, Physiologic/instrumentation, Oxygen Consumption/physiology, Running, Switzerland
Pubmed
Web of science
Création de la notice
19/09/2013 10:35
Dernière modification de la notice
20/08/2019 14:26
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