Table 7.
Analysis of heart rate variability in terms of relative variation (%) between supine and sitting positions of evaluation according to group and moment.
| Variables | Moment | Groups | Effect Size (EF) | ||
|---|---|---|---|---|---|
| Control | Experimental | ||||
| Time domain | SDNN 1 | Initial | 11.6 (−27.0–50.0) | 11.2 (−45.7–100.0) | 0.097 |
| Final | −2.2 (−24.2–24.9) | −1.1 (−16.3–5.9) | 0.056 | ||
| EF | 0.035 | 0.013 | |||
| RMSSD 2 | Initial | −0.23 ± 25.39 | −5.65 ± 31.02 | 0.008 | |
| Final | −22.64 ± 10.65 # | −10.34 ± 29.39 | 0.050 | ||
| EF | 0.162 | 0.020 | |||
| Frequency domain | LF 1 | Initial | 46.3 (−48.5–189.2) | 29.3 (−62.9–423.5) | 0.046 |
| Final | 55.8 (−46.1–207.4) | 29.4 (−54.4–166.4) | 0.066 | ||
| EF | 0.035 | 0.966 | |||
| HF 2 | Initial | 19.2 ± 85.7 | 4.7 ± 66.4 | 0.009 | |
| Final | 25.8 ± 144.4 | 5.2 ± 74.8 | 0.010 | ||
| EF | 0.003 | 0.000 | |||
| Total 2 | Initial | 31.9 ± 64.0 | 34.5 ± 82.7 | 0.000 | |
| Final | 30.7 ± 67.4 | 21.6 ± 67.1 | 0.004 | ||
| EF | 0.000 | 0.021 | |||
| LF/HF 1 | Initial | 59 (−44–196) | 50 (−77–1445) | 0.148 | |
| Final | 56 (−63–548) | 49 (−20–1758) | 0.005 | ||
| EF | 0.035 | 0.013 | |||
| Non-Linear | SampEn 1 | Initial | −9.2 (−20.8–−2.5) | −8.3 (−23.4–72.6) | 0.105 |
| Final | −13.4 (−29.1–35.5) | −2.4 (−22.3–17.2) | 0.065 | ||
| EF | 0.128 | 0.250 | |||
| DFA Alfa 1 1 | Initial | 4.3 (−24.4–49.6) | 13.0 (−17.1–245.2) | 0.169 | |
| Final | 15.8 (−1.9–55.1) | 10.8 (−4.0–44.2) | 0.179 | ||
| EF | 0.385 | 0.104 | |||
Note. SDNN, standard deviation of normal–normal beats; RMSSD, root-mean-square of successive RR intervals. LF, low frequency; HF, high frequency; LF/HF, ratio between high and low frequencies; EF, effect size. 1 Values expressed as the median and total amplitude; EF expressed as r estimated. 2 Values expressed as the mean ± standard deviation; EF expressed as partial eta squared (ηp2); # p < 0.05 versus experimental group-initial.