Table 6.
Electrocardiogram signal quality—saltwater immersion without movement condition.
| Parameter | Ag/AgCl | PLS | p-Value | Ag/AgCl | PLP | p-Value | |
|---|---|---|---|---|---|---|---|
| Temporal measures of HRV | meanNN (ms) | 882 ± 162 | 823 ± 86 | 0.3275 | 841 ± 103 | 813 ± 110 | 0.4972 |
| SDNN (ms) | 359 ± 383 | 130 ± 43 | 0.0776 | 313 ± 154 | 124 ± 82 | 0.0004 | |
| RMSSD (ms) | 428 ± 396 | 175 ± 60 | 0.0410 | 421 ± 210 | 158 ± 117 | 0.0004 | |
| NN50 | 92.4 ± 73.5 | 62.5 ± 38.3 | 0.2903 | 246.2 ± 184.5 | 159.6 ± 157.5 | 0.1998 | |
| Spectral measures of HRV | LF (ms2) | 21595 ± 31984 | 2845 ± 1473 | 0.0405 | 25621 ± 24694 | 5994 ± 7756 | 0.0087 |
| HF (ms2) | 40166 ± 60509 | 6642 ± 5420 | 0.0480 | 43893 ± 39516 | 10705 ± 14515 | 0.0066 | |
| Total (ms2) | 753959 ± 34646 | 606370 ± 14328 | 0.2291 | 652235 ± 238080 | 557039 ± 206664 | 0.2688 | |
| LF/HF | 0.5562 ± 0.1238 | 0.5097 ± 0.1648 | 0.4850 | 0.5673 ± 0.1620 | 1.2010 ± 1.8080 | 0.2029 | |
| Corr-Coef | r (unitless) | 0.57 ± 0.19 | 0.73 ± 0.10 | 0.0000 | 0.57 ± 0.19 | 0.69 ± 0.06 | 0.0000 |