Dynamical heart beat correlations during running
Molkkari,Matti; Angelotti,Giorgio; Emig,Thorsten; Räsänen,Esa (2020)
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited
Julkaisun pysyvä osoite on
Fluctuations of the human heart beat constitute a complex system that has been studied mostly under resting conditions using conventional time series analysis methods. During physical exercise, the variability of the fluctuations is reduced, and the time series of beat-to-beat RR intervals (RRIs) become highly non-stationary. Here we develop a dynamical approach to analyze the time evolution of RRI correlations in running across various training and racing events under real-world conditions. In particular, we introduce dynamical detrended fluctuation analysis and dynamical partial autocorrelation functions, which are able to detect real-time changes in the scaling and correlations of the RRIs as functions of the scale and the lag. We relate these changes to the exercise intensity quantified by the heart rate (HR). Beyond subject-specific HR thresholds the RRIs show multiscale anticorrelations with both universal and individual scale-dependent structure that is potentially affected by the stride frequency. These preliminary results are encouraging for future applications of the dynamical statistical analysis in exercise physiology and cardiology, and the presented methodology is also applicable across various disciplines.
- TUNICRIS-julkaisut 
Näytetään aineisto, joilla on samankaltaisia nimekkeitä, tekijöitä tai asiasanoja.
Smirnov,Sergey; Gotchev,Atanas; Hannuksela,Miska
IEEE International Conference on Multimedia and Expo (2013)
Joint de-noising and fusion of 2D video and depth map sequences sensed by low-powered tof range sensor Georgiev,Mihail; Gotchev,Atanas; Hannuksela,Miska
IEEE International Conference on Multimedia and Expo (Institute of Electrical and Electronics Engineers IEEE, 2013)
Georgiev,Mihail; Gotchev,Atanas; Hannuksela,Miska
IEEE International Symposium on Circuits and Systems (Institute of Electrical and Electronics Engineers IEEE, 2013)