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. 2013;2013:564340.
doi: 10.1155/2013/564340. Epub 2013 Mar 5.

Improvement of Circadian Rhythm of Heart Rate Variability by Eurythmy Therapy Training

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Free PMC article

Improvement of Circadian Rhythm of Heart Rate Variability by Eurythmy Therapy Training

Georg Seifert et al. Evid Based Complement Alternat Med. .
Free PMC article

Abstract

Background. Impairment of circadian rhythm is associated with various clinical problems. It not only has a negative impact on quality of life but can also be associated with a significantly poorer prognosis. Eurythmy therapy (EYT) is an anthroposophic movement therapy aimed at reducing fatigue symptoms and stress levels. Objective. This analysis of healthy subjects was conducted to examine whether the improvement in fatigue symptoms was accompanied by improvements in the circadian rhythm of heart rate variability (HRV). Design. Twenty-three women performed 10 hours of EYT over six weeks. Electrocardiograms (ECGs) were recorded before and after the EYT trial. HRV was quantified by parameters of the frequency and time domains and the nonlinear parameters of symbolic dynamics. Results. The day-night contrast with predominance of vagal activity at night becomes more pronounced after the EYT training, and with decreased Ultralow and very low frequencies, the HRV shows evidence of calmer sleep. During the night, the complexity of the HRV is significantly increased indicated by nonlinear parameters. Conclusion. The analysis of the circadian patterns of cardiophysiological parameters before and after EYT shows significant improvements in HRV in terms of greater day-night contrast caused by an increase of vagal activity and calmer and more complex HRV patterns during sleep.

Figures

Figure 1
Figure 1
Box plots of the HRV index (ULF + VLF)/P for day time before and after EYT and night time before and after EYT.
Figure 2
Figure 2
Behaviour of MSE indices before and after EYT. The sample entropy (SampEn) (y-axis) is plotted over the scales (x-axis). (a) MSE during day before and after EYT. (b) MSE during night before and after YET. (c) MSE during day and night before EYT. (d) MSE during day and night after EYT.
Figure 3
Figure 3
Error bar of the indices scale 2 and scale 20 comparing day and night times before and after EYT (confidence interval 95%).
Figure 4
Figure 4
Differences of selected HRV indices between day and night times before (blue) and after (green) EYT as percentage changes.

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