Estimation of Respiratory Frequency in Women and Men by Kubios HRV Software Using the Polar H10 or Movesense Medical ECG Sensor during an Exercise Ramp

Figures

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  Figure 1. Regression plots for the comparison of respiratory frequency (RF) in breaths/min (b/min) for the (A) Movesense Medical sensor ECG (MS ECG) and the (B) Polar H10 sensor chest belt device (H10) vs gas exchange data (GE) during the incremental exercise test. Coefficient of determination (R2), Pearson’s r, standard error of estimate (SEE), and p value shown in the bottom right plot. Regression line in red, line of unity shown in dark grey.

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  Figure 2. Bland–Altman analysis of respiratory frequency (RF) as breaths/min (b/min) for the (A) Movesense Medical sensor ECG (MS ECG) and the (B) Polar H10 sensor chest belt device (H10) vs the gas exchange data (GE) during the incremental exercise test until voluntary exhaustion. Center solid line in each plot represents the mean bias (difference) between each paired value as absolute values. The top and bottom dashed lines are LoA (1.96 standard deviations from the mean difference).

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  Figure 3. Respiratory frequency (RF) plotted over time for Movesense Medical sensor ECG (MS ECG), Polar H10 (H10) (Kubios window width: 30 s, grid interval: 1 s) and the gas exchange data (GE) in four representative participants. (A): 26-year-old female with a BMI of 30 kg/m², VO2MAX of 38 mL/kg/min, Kubios artifact rate of 0.5%; (B): 27-year-old female with a BMI of 22 kg/m², VO2MAX of 42 mL/kg/min, Kubios artifact rate of 0.0%; (C): 47-year-old male with a BMI of 38 kg/m², VO2MAX of 31 mL/kg/min, Kubios artifact rate of 0.0%; (D): 25-year-old female with a BMI of 21 kg/m², VO2MAX of 40 mL/kg/min, Kubios HRV artifact rate of 0.7%. MS ECG (red circle), H10 (blue circle), GE (black). Ramp termination corresponds with peak GE respiratory rate. Length of post ramp recovery determined by data recording cessation and artifacts below 3%.