Table 2.
Summary statistics of the HRV indices of pilots, compared with the normative values for short-term HRV of healthy adults [42].
| HRV Index | Category | Mean | SD | Median | Min | Max |
|---|---|---|---|---|---|---|
| SDNN (ms) | Pilots (during simulations) | 34.1 | 12.7 | 32.1 | 12.3 | 59.3 |
| Pilots (before simulations) | 40.0 | 11.7 | 40.9 | 19.3 | 58.0 | |
| Normative values | 50.0 | 16.0 | 51.0 | 32.0 | 93.0 | |
| RMSSD (ms) | Pilots (during simulations) | 23.8 | 10.2 | 22.6 | 6.2 | 48.0 |
| Pilots (before simulations) | 26.7 | 9.4 | 26.7 | 12.8 | 48.4 | |
| Normative values | 42.0 | 15.0 | 42.0 | 19.0 | 75.0 | |
| LF/HF | Pilots (during simulations) | 5.7 | 2.8 | 5.5 | 1.5 | 14.1 |
| Pilots (before simulations) | 5.5 | 2.4 | 5.8 | 2.8 | 12.0 | |
| Normative values | 2.8 | 2.6 | 2.1 | 1.1 | 11.6 |