Table III.
Heart rate variability parameters in studied groups before and after water load (means and 95% confidence interval)
| Water load | Obese (n = 24) | Normal weight (n = 21) | ||
|---|---|---|---|---|
| Before | After | Before | After | |
| RR [ms] | 877 (833-921) | 901 (856-947) | 863 (800-926) | 875 (816-934) |
| Total power [ms2] | 4067 (2977-5158) | 5447* (3829-7065) | 4684 (3502-5866) | 5227 (3528-6927) |
| LF [ms2] | 1003 (709-1297) | 1248** (958-1538) | 1317 (966-1668) | 1493 (970-2016) |
| HF [ms2] | 898 (573-1224) | 888 (615-1160) | 1081 (723-1438) | 858 (622-1095) |
| LF/HF | 1.32 (1.04-1.60) | 1.73* (1.33-2.10) | 1.47 (1.10-1.80) | 1.79* (1.40-2.10) |
| SDNN [ms] | 70.8 (59.3-82.4) | 74.4 (62.3-86.5) | 75.3 (64.4-86.1) | 72.2 (58.7-85.6) |
| rMSSD [ms] | 62.5 (45.6-79.5) | 63.2 (51.5-75.0) | 65.2 (53.0-77.4) | 58.2 (45.1-71.3) |
RR – duration between two consecutive R waves of the ECG, LF – low frequency (0.04-0.15 Hz), HF – high frequency (0.15-0.4 Hz), LF/HF – low frequency/high frequency index, SDNN – standard deviation of all normal RR intervals, rMSSD – root-mean-square difference between successive RR normal intervals
*
p < 0.05
**
p < 0.01 – after vs. before water load