Abstract
Background: Quickness and simplicity of examining procedures belong to the key criteria of decision-making process whether the spectral analysis of heart rate variability (SA HRV) would be implemented into the sports training routine as a diagnostic tool. Objective: The main aim of this study was to find out how results of the SA HRV are influenced when reducing duration of the first position of standardized orthoclinostatic maneuver (supine-standing-supine) from 5 minutes to 60 seconds. Methods: The sample consisted of 28 healthy persons divided into two groups (G1 - n = 14, 7 males and 7 females aged 19 to 23; G2 - n = 14, 9 males and 5 females aged 17 to 22). The G1 underwent the autonomic nervous system (ANS) activity assessment firstly by the modified procedure and consecutively by the standard procedure. This order was reversed in the G2. The ANS activity was represented by both, individual HRV parameters and complex indices of the SA HRV. Results: When comparing the standard and modified procedure of the ANS assessment, no significant differences in any of the assessed parameters of the HRV were found. The correlation analysis that the results of the SA HRV indices between both measures of the ANS are highly related was found. This dependence was also present in a majority of the individual HRV parameters. Conclusions: According to the results of this research, the time-modified method of the ANS assessment provides results of the SA HRV which are comparable to the traditionally applied orthoclinostatic maneuver.
Highlights
Heart rate variability (HRV) is a term widely used in literature to denote oscillation of consequential R-R intervals which is generally considered to be a non-invasive index of autonomous cardiac regulation (Akselrod et al, 1981; Arai et al, 1989; Javorka, 2008; Malik & Camm, 1995)
The high number of individual HRV parameters (30+) often leading to interpretive collisions and effort to increase the sensitivity of whole method to identify even small changes in the autonomic nervous system (ANS) activity were the main motives when creating the complex indices of the spectral analysis of heart rate variability (SA HRV) (Stejskal, Šlachta, Elfmark, Salinger, & Gaul-Aláčová, 2002) which would combine all age-dependent spectral parameters obtained during the standardized orthoclinostatic maneuver
A correlation between related parameters of power very low frequency (PVLF), power high frequency (PHF), R-R, PT, and power low frequency (PLF)/PHF ratio collected during the standard and modified HRV assessment was found in G1 (Table 3)
Summary
Heart rate variability (HRV) is a term widely used in literature to denote oscillation of consequential R-R intervals which is generally considered to be a non-invasive index of autonomous cardiac regulation (Akselrod et al, 1981; Arai et al, 1989; Javorka, 2008; Malik & Camm, 1995). From practical experience with monitoring application of ANS activity when using the complex indices of the SA HRV within sports training process (Botek, Stejskal, & Svozil, 2010; Cipryan et al, 2007) it is evident that, for coaches and athletes, quickness and simplicity of the examining procedure becomes one of the key criteria of the decision-making process if the methods of SA HRV should or should not be implemented into the training routine as a diagnostic tool. Quickness and simplicity of examining procedures belong to the key criteria of decision-making process whether the spectral analysis of heart rate variability (SA HRV) would be implemented into the sports training routine as a diagnostic tool. CONCLUSIONS: According to the results of this research, the time-modified method of the ANS assessment provides results of the SA HRV which are comparable to the traditionally applied orthoclinostatic maneuver
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