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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Changes in the Complexity of Heart Rate Variability with Exercise Training Measured by Multiscale Entropy-Based Measurements

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Fazan, Frederico Sassoli [1] ; Brognara, Fernanda [1] ; Fazan Junior, Rubens [1] ; Murta Junior, Luiz Otavio [2] ; Virgilio Silva, Luiz Eduardo [1, 3]
Total Authors: 5
[1] Univ Sao Paulo, Sch Med Ribeirao Preto, Dept Physiol, BR-14049900 Ribeirao Preto, SP - Brazil
[2] Univ Sao Paulo, Sch Philosophy Sci & Languages Ribeirao Preto, Dept Comp & Math, BR-14040901 Ribeirao Preto, SP - Brazil
[3] Univ Sao Paulo, Inst Math & Comp Sci, Dept Comp Sci, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Entropy; v. 20, n. 1 JAN 2018.
Web of Science Citations: 5

Quantifying complexity from heart rate variability (HRV) series is a challenging task, and multiscale entropy (MSE), along with its variants, has been demonstrated to be one of the most robust approaches to achieve this goal. Although physical training is known to be beneficial, there is little information about the long-term complexity changes induced by the physical conditioning. The present study aimed to quantify the changes in physiological complexity elicited by physical training through multiscale entropy-based complexity measurements. Rats were subject to a protocol of medium intensity training (n = 13) or a sedentary protocol (n = 12). One-hour HRV series were obtained from all conscious rats five days after the experimental protocol. We estimated MSE, multiscale dispersion entropy (MDE) and multiscale SDiff q from HRV series. Multiscale SDiff q is a recent approach that accounts for entropy differences between a given time series and its shuffled dynamics. From SDiff q , three attributes (q-attributes) were derived, namely SDiff q m a x, q m a x and q z e r o. MSE, MDE and multiscale q-attributes presented similar profiles, except for SDiff q m a x . qmax showed significant differences between trained and sedentary groups on Time Scales 6 to 20. Results suggest that physical training increases the system complexity and that multiscale q-attributes provide valuable information about the physiological complexity. (AU)

FAPESP's process: 17/05163-6 - Role of the parasympathetic and sympathetic autonomic nervous system in the modulation of sepsis in unanesthetized rats
Grantee:Fernanda Brognara Penteado Dias
Support type: Scholarships in Brazil - Doctorate (Direct)