The Polar RS800CX demonstrated moderate 2-week test-retest reliability for recording heart rate variability in 60 healthy adults, especially using the auto-regressive transformation method.
Observational (n=60)
Summary Recently, research has validated the use of Polar ® heart rate monitors as a tool to index heart rate variability ( HRV ). In the current investigation, we sought to evaluate the test–retest reliability of both time and frequency domain measures of HRV using the Polar ® RS 800 CX ™ . Continuous HRV data were collected as 60 nominally healthy adults underwent a resting and orthostatic stress test. We evaluated reproducibility by means of the interclass correlation coefficient for absolute agreement and consistency, and the standard error of measurement. We found moderate reliable 2‐week test–retest reliability of HRV using the Polar ® RS 800 CX ™ , results that are in line with previous studies that have validated the stability of HRV using other methods of measurement (e.g. electrocardiogram). Additionally, when examining different methods of spectral density estimation, we found that using the auto‐regressive transformation method provides the most stable indices of HRV . Taken together, our results suggest that the Polar ® RS 800 CX ™ is not only a valid method to record HRV , but also a reliable one, particularly when using the auto‐regressive transformation method.
Williams et al. (Wed,) conducted a observational in Healthy adults (n=60). Polar RS800CX heart rate monitor was evaluated on Test-retest reliability of time and frequency domain measures of HRV. The Polar RS800CX demonstrated moderate 2-week test-retest reliability for recording heart rate variability in 60 healthy adults, especially using the auto-regressive transformation method.
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