The Zephyr BioHarness provided heart rate and respiratory rate measurements that were highly correlated with standard metabolic systems during graded exercise and sustained exercise in the heat.
Observational (n=12)
No
Does the Zephyr BioHarness accurately measure heart rate and respiratory rate during exercise compared to standard metabolic systems?
The Zephyr BioHarness provides comparable heart rate and respiratory rate measurements to standard metabolic systems over a wide range of exercise intensities and in hot environments.
Estimación del efecto: r = 0.87-0.96 (HR) and r = 0.80-0.97 (RR)
The Zephyr BioHarness was tested to determine the accuracy of heart rate (HR) and respiratory rate (RR) measurements during 2 exercise protocols in conjunction with either a laboratory metabolic cart (Vmax) or a previously validated portable metabolic system (K4b2). In one protocol, HR and RR were measured using the BioHarness and Vmax during a graded exercise up to V˙O2max (n=12). In another protocol, HR and RR were measured using the BH and K4b2 during sustained exercise (30% and 50% V˙O2max for 20 min each) in a hot environment (30 °C, 50% relative humidity) (n=6). During the graded exercise, HR but not RR, obtained from the BioHarness was higher compared to the Vmax at baseline and 30% V˙O2max (p<0.05), but showed no significant difference at other stages with high correlation coefficients for both HR (r=0.87-0.96) and RR (r=0.90-0.99 above 30% V˙O2max). During the exercise in the heat, there were no significant differences between the BioHarness and K4b2 system. Correlation coefficients between the methods were low for HR but moderately to highly correlated (0.49-0.99) for RR. In conclusion, the BioHarness is comparable to Vmax and K4b2 over a wide range of V˙O2 during graded exercise and sustained exercise in the heat.
Kim et al. (Thu,) conducted a observational in Healthy (n=12). Zephyr BioHarness vs. Vmax metabolic cart and K4b2 portable metabolic system was evaluated on Accuracy of heart rate and respiratory rate measurements (r = 0.87-0.96 (HR) and r = 0.80-0.97 (RR)). The Zephyr BioHarness provided heart rate and respiratory rate measurements that were highly correlated with standard metabolic systems during graded exercise and sustained exercise in the heat.