Temporal dynamics of the circadian heart rate following low and high volume exercise training in sedentary male subjects

Jelinek, Herbert F.., Karmakar, C., Kiviniemi, A. M., Hautala, A. J., Tulppo, M. P., Mäkikallio, T. H., Huikuri, H. V., Khandoker, A. H. and Palaniswami, M. 2015, Temporal dynamics of the circadian heart rate following low and high volume exercise training in sedentary male subjects, European journal of applied physiology, vol. 115, no. 10, pp. 2069-2080, doi: 10.1007/s00421-015-3185-x.

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Title Temporal dynamics of the circadian heart rate following low and high volume exercise training in sedentary male subjects
Author(s) Jelinek, Herbert F..
Karmakar, C.ORCID iD for Karmakar, C. orcid.org/0000-0003-1814-0856
Kiviniemi, A. M.
Hautala, A. J.
Tulppo, M. P.
Mäkikallio, T. H.
Huikuri, H. V.
Khandoker, A. H.
Palaniswami, M.
Journal name European journal of applied physiology
Volume number 115
Issue number 10
Start page 2069
End page 2080
Total pages 12
Publisher Springer
Place of publication Berlin, Germany
Publication date 2015-05-21
ISSN 1439-6319
Keyword(s) circadian
cosinor modeling
heart rate variability
Summary Purpose: Increased risk of arrhythmic events occurs at certain times during the circadian cycle with the highest risk being in the second and fourth quarter of the day. Exercise improves treatment outcome in individuals with cardiovascular disease. How different exercise protocols affect the circadian rhythm and the associated decrease in adverse cardiovascular risk over the circadian cycle has not been shown. Methods: Fifty sedentary male participants were randomized into an 8-week high volume and moderate volume training and a control group. Heart rate was recorded using Polar Electronics and investigated with Cosinor analysis and by Poincaré plot derived features of SD1, SD2 and the complex correlation measure (CCM) at 1-h intervals over the 24-h period. Results: Moderate exercise significantly increased vagal modulation and the temporal dynamics of the heart rate in the second quarter of the circadian cycle (p = 0.004 and p = 0.007 respectively). High volume exercise had a similar effect on vagal output (p = 0.003) and temporal dynamics (p = 0.003). Cosinor analysis confirms that the circadian heart rate displays a shift in the acrophage following moderate and high volume exercise from before waking (1st quarter) to after waking (2nd quarter of day). Conclusions: Our results suggest that exercise shifts vagal influence and increases temporal dynamics of the heart rate to the 2nd quarter of the day and suggest that this may be the underlying physiological change leading to a decrease in adverse arrhythmic events during this otherwise high-risk period.
Language eng
DOI 10.1007/s00421-015-3185-x
Field of Research 090399 Biomedical Engineering not elsewhere classified
090305 Rehabilitation Engineering
090609 Signal Processing
080109 Pattern Recognition and Data Mining
1106 Human Movement And Sports Science
Socio Economic Objective 970108 Expanding Knowledge in the Information and Computing Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082915

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