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Two‐week test–retest reliability of the P olar ® RS 800 CX ™ to record heart rate variability
Author(s) -
Williams DeWayne P.,
Jarczok Marc N.,
Ellis Robert J.,
Hillecke Thomas K.,
Thayer Julian F.,
Koenig Julian
Publication year - 2017
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/cpf.12321
Subject(s) - heart rate variability , intraclass correlation , medicine , reproducibility , reliability (semiconductor) , heart rate , coefficient of variation , interclass correlation , statistics , mathematics , blood pressure , physics , power (physics) , quantum mechanics
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.