Received: 30-03-2012 -- Accepted: 04-05-2012 --
Published (online): 01-09-2012
The Bioharness™ 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 Bioharness™ 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.
Physiological technology, precision of measurement, exercise
Different levels of precision exist for each variable in the Bioharness (Version 1) multi-variable monitoring device
Accelerometry and posture variables presented the most precise data
Data from the heart rate and breathing frequency variable decrease in precision at velocities ≥ 10 km·h
Clear understanding of the limitations of new applied monitoring technology is required before it is used by the exercise scientist
Andrew T. Garrett, James A. Johnstone, Tim Watson, Gerwyn Hughes, Paul A. Ford,
Bioharness Multivariable Monitoring Device: Part. I: Validity.
Journal of Sports Science and Medicine(11), 400 - 408.
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