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Bioharness™ multivariable monitoring device. Part I: Validity

Garrett, Andrew; Johnstone, James A.; Ford, Paul A.; Hughes, Gerwyn; Watson, Tim; Garrett, Andrew T.


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Dr Andrew Garrett
Senior Lecturer in Exercise and Environmental Physiology

James A. Johnstone

Paul A. Ford

Gerwyn Hughes

Tim Watson

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Dr Andrew Garrett
Senior Lecturer in Exercise and Environmental Physiology


The BioharnessTM monitoring system may provide physiological information on human performance but there is limited information on its validity. The objective of this study was to assess the validity of all 5 BioharnessTM variables using a laboratory based treadmill protocol. 22 healthy males participated. Heart rate (HR), Breathing Frequency (BF) and Accelerometry (ACC) precision were assessed during a discontinuous incremental (0-12 km·h-1) treadmill protocol. Infra-red skin temperature (ST) was assessed during a 45 min-1 sub- maximal cycle ergometer test, completed twice, with environmental temperature controlled at 20 ± 0.1 °C and 30 ± 0.1 °C. Posture (P) was assessed using a tilt table moved through 160°. Adopted precision of measurement devices were; HR: Polar T31 (Polar Electro), BF: Spirometer (Cortex Metalyser), ACC: Oxygen expenditure (Cortex Metalyser), ST: Skin thermistors (Grant Instruments), P:Goniometer (Leighton Flexometer). Strong relationships (r = .89 to .99, p < 0.01) were reported for HR, BF, ACC and P. Limits of agreement identified differences in HR (-3.05 ± 32.20 b·min-1), BF (-3.46 ± 43.70 br·min-1) and P (0.20 ± 2.62°). ST established a moderate relationships (-0.61 ± 1.98 °C; r = 0.76, p < 0.01). Higher velocities on the treadmill decreased the precision of measurement, especially HR and BF. Global results suggest that the BioharressTM is a valid multivariable monitoring device within the laboratory environment.


Johnstone, J. A., Ford, P. A., Hughes, G., Watson, T., & Garrett, A. T. (2012). Bioharness™ multivariable monitoring device. Part I: Validity. Journal of sports science & medicine, 11(3), 400 - 408

Journal Article Type Article
Acceptance Date May 4, 2012
Online Publication Date Sep 1, 2012
Publication Date Sep 1, 2012
Journal Journal of Sports Science and Medicine
Print ISSN 1303-2968
Peer Reviewed Peer Reviewed
Volume 11
Issue 3
Pages 400 - 408
Keywords Physiological technology; precision of measurement; exercise.
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