Behaviour of globally chaotic parameters of heart rate variability following a protocol of exercise with flexible pole
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Aim. The aim of this study was to evaluate the effect of flexible pole exercise on cardiac autonomic modulation. This was investigated while at rest before and, then in the recovery phase from the flexible pole exercise. Material and methods. Thirty-two female subjects were allocated to equal groups. The analysis of cardiac autonomic modulation was through the recording of temporal separations of interpeak RR intervals taken from the heart rate monitor. The analysis was performed by chaotic global measures of heart rate variability (HRV). Two parameters were proposed based on the greater resolution of multi-taper method (MTM) power spectra. They were high spectral entropy (hsEntropy) and high spectral detrended fluctuation analysis (hsDFA) and were applied owing to the greater parametric response in short data series. After applying Anderson-Darling and Lilliefors tests for confirmation of high non-normality; Kruskal-Wallis test of significance was used for the statistical analysis, with the level of significance moderately set at (p<0.15). Results. On recovery from flexible pole exercise there was a significant decrease in three of the combinations of CFP. The algorithm which applied all three chaotic global parameters was the optimum statistically measured by Kruskal-Wallis and standard deviation. It was also the most influential by principal component analysis (PCA) with almost all variation covered by the first two components. Conclusion. Flexible pole exercise leads to a further significant decrease in chaosity measured by the combination of chaotic globals.