Table 4.
HRV during simulated and real flights.
| Variables | Real Flight Mean (SD) |
Simulated Flight Mean (SD) |
p-Value | Effect Size |
|---|---|---|---|---|
| Mean HR | 93.81 (15.41) | 70.83 (12.48) | 0.003 * | 0.847 |
| RR | 660.30 (106.86) | 875.58 (139.10) | 0.003 * | 0.847 |
| Pnn50 | 11.75 (8.83) | 17.69 (14.26) | 0.131 | 0.436 |
| RMSSD | 32.52 (14.34) | 38.93 (18.04) | 0.110 | 0.461 |
| SDNN | 53.20 (23.73) | 47.98 (20.55) | 1.000 | <0.001 |
| HF | 20.95 (12.95) | 29.06 (17.28) | 0.155 | 0.411 |
| LF | 79.02 (12.96) | 70.89 (17.27) | 0.155 | 0.411 |
| LF/HF | 5.87 (4.11) | 3.84 (2.94) | 0.131 | 0.436 |
| Total Power | 2750.74 (1733.18) | 2721.90 (2647.31) | 0.929 | 0.026 |
| SD1 | 23.02 (10.15) | 27.56 (12.78) | 0.110 | 0.462 |
| SD2 | 71.14 (31.89) | 61.77 (26.66) | 0.657 | 0.128 |
* p-value < 0.05. HR: heart rate; RR: Time between intervals R-R; pNN50: Percentage of intervals >50 ms different from the previous interval; RMSSD: The square root of the mean of the squares of the successive differences of the interval RR; LF/HF: Low frequency (LF) ratio (ms2)/High frequency (HF) (ms2); Total power: The sum of all the spectra; SDNN: Standard deviation of normal-to-normal intervals; SD1: Dispersion, standard deviation, of points perpendicular to the axis of line-of-identity in the Poincaré plot; SD2: Dispersion, standard deviation, of points along the axis of line-of-identity in the Poincaré plot.