RR interval signal quality of a heart rate monitor and an ECG Holter at rest and during exercise
This study was designed to examine the RR interval signal qualities of a Holter device and a heart rate chest belt monitor at rest and during exercise. Ten healthy individuals completed five low- to high-intensity activities while simultaneously using the medilog® AR12plus Holter monitor and the Polar H10 heart rate monitor. The RR interval signal quality was based on the quantification of the missing RR intervals and RR interval detection errors. Therefore, both measurement systems were compared against visual inspection of the raw electrocardiography signal. The missing and wrong R-wave peak detections were counted manually for both measurement systems. RR interval signal quality was defined as the relative number of correctly detected RR intervals. Overall, RR interval signal qualities of 94.6% and 99.6% were demonstrated for the medilog® AR12plus and the Polar H10. During the high-intensity activities, the RR interval signal quality of the medilog® AR12plus dropped to 89.8%, whereas the Polar H10 maintained a signal quality of 99.4%. The correlation between both systems was high (r = 0.997, p > 0.001). The excellent RR interval signal quality during low- to moderate-intensity activities in the medilog® AR12plus and during low- to high-intensity activities in the Polar H10 demonstrates both measurement systems’ validity for the detection of RR intervals throughout a wide range of activities. A simple chest strap such as the Polar H10 might be recommended as the gold standard for RR interval assessments if intense activities with strong body movements are investigated.
KeywordsValidity Low- to high-intensity activities Gold standard Heart rate measurement
Heart rate variability
Limits of agreement
RGA and TW conceived and designed the research. RGA and TS conducted the experiments. RGA analyzed the data and wrote the manuscript. All authors read and approved the manuscript.
Polar Electro Oy (Finland) funded in part the experiment described in this article.
Compliance with ethical standards
Conflicts of interest
The authors declare that they have no conflict of interest.
All procedures performed in this study were in accordance with the ethical standards of the cantonal ethics committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
- Barbosa MP, da Silva NT, de Azevedo FM, Pastre CM, Vanderlei LC (2016) Comparison of Polar(R) RS800G3 heart rate monitor with Polar(R) S810i and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest. Clin Physiol Funct Imaging 36(2):112–117. https://doi.org/10.1111/cpf.12203 CrossRefGoogle Scholar
- Borg G (1970) Perceived exertion as an indicator of somatic stress. Scand J Rehabil Med 2(2):92–98Google Scholar
- Costa RBMPd, Mícolis AF, Marcelo PC, Marques VLC (2016) Comparison of Polar® RS800G3™ heart rate monitor with Polar® S810i™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest. Clin Physiol Funct Imaging 36(2):112–117. https://doi.org/10.1111/cpf.12203 CrossRefGoogle Scholar
- Gamelin FX, Berthoin S, Bosquet L (2006) Validity of the polar S810 heart rate monitor to measure R–R intervals at rest. Med Sci Sports Exerc 38(5):887–893. https://doi.org/10.1249/01.mss.0000218135.79476.9c CrossRefGoogle Scholar
- Nunan D, Jakovljevic DG, Donovan G, Hodges LD, Sandercock GR, Brodie DA (2008) Levels of agreement for RR intervals and short-term heart rate variability obtained from the Polar S810 and an alternative system. Eur J Appl Physiol 103(5):529–537. https://doi.org/10.1007/s00421-008-0742-6 CrossRefGoogle Scholar
- Plews DJ, Scott B, Altini M, Wood M, Kilding AE, Laursen PB (2017) Comparison of heart-rate-variability recording with smartphone photoplethysmography, polar H7 chest strap, and electrocardiography. Int J Sports Physiol Perform 12(10):1324–1328. https://doi.org/10.1123/ijspp.2016-0668 CrossRefGoogle Scholar
- Singh N, Moneghetti K, Christle JW, Hadley D, Plews D, Froelicher V (2018) Heart rate variability: an old metric with new meaning in the era of using mHealth technologies for health and exercise training guidance. Part one: physiology and methods. Arrhythm Electrophysiol Rev 7(3):193–198. https://doi.org/10.15420/aer.2018.27.2 CrossRefGoogle Scholar
- Tulppo MP, Makikallio TH, Seppanen T, Laukkanen RT, Huikuri HV (1998) Vagal modulation of heart rate during exercise: effects of age and physical fitness. Am J Physiol 274(2 Pt 2):H424–H429Google Scholar
- Weippert M, Kumar M, Kreuzfeld S, Arndt D, Rieger A, Stoll R (2010) Comparison of three mobile devices for measuring R–R intervals and heart rate variability: polar S810i, Suunto t6 and an ambulatory ECG system. Eur J Appl Physiol 109(4):779–786. https://doi.org/10.1007/s00421-010-1415-9 CrossRefGoogle Scholar