Table 2.
Change of the HRV variables and the HR for each colour condition. Three changes are given, indicated by the time points (TP) in the second column. Note that the asterisks indicate significance according to the Friedman test but not the paired test for the displayed TP change. Results for the three Friedman tests for a change during colour stimulation (p col, in row TP7-TP3), during recovery (p recov, in row TP13-TP7), and for an overall change (p all, in row TP13-TP3) are indicated.
| Mean change ± SD of variable/Result of Friedman test | |||||
|---|---|---|---|---|---|
| Red | Green | Blue | Yellow | ||
| Total power | TP7-TP3 | −26.62 ± 73.70 | −12.358 ± 68.72/* | −39.452 ± 58.38/* | −18.646 ± 53.95 |
| [ms2 × 10−3] | TP13-TP7 | −49.15 ± 103.06/* | −52.94 ± 96.05 | −64.54 ± 56.10/*** | −115.88 ± 102.13/*** |
| TP13-TP3 | −75.77 ± 102.37/*** | −65.30 ± 101.86/*** | −103.99 ± 67.04/*** | −134.53 ± 122.15/*** | |
| VLF | TP7-TP3 | −26.759 ± 73.57 | −12.342 ± 68.52/* | −39.112 ± 58.35/* | −18.016 ± 53.46 |
| [ms2 × 10−3] | TP13-TP7 | −48.63 ± 102.52/* | −52.78 ± 95.71/* | −64.12 ± 55.97/*** | −116.19 ± 101.87/*** |
| TP13-TP3 | −75.38 ± 101.76/*** | −65.12 ± 101.44/*** | −103.23 ± 66.92/*** | −134.21 ± 121.69/*** | |
| LF | TP7-TP3 | 351 ± 641 | 87 ± 1329 | −77 ± 986 | −660 ± 1705 |
| [ms2] | TP13-TP7 | −362 ± 1160 | 24 ± 1369 | −302 ± 1116 | 431 ± 1291 |
| TP13-TP3 | −12 ± 1009 | 111 ± 1182 | −379 ± 1320 | −229 ± 2124 | |
| LF norm | TP7-TP3 | 7.41 ± 10.01/* | 3.99 ± 12.97 | 8.15 ± 14.25 | −1.49 ± 16.09 |
| [%] | TP13-TP7 | −0.82 ± 13.12 | 5.74 ± 14.33/* | 0.48 ± 16.96 | 6.68 ± 9.79 |
| TP13-TP3 | 6.59 ± 13.03/*** | 9.73 ± 15.49/** | 8.64 ± 19.37 | 5.19 ± 19.53 | |
| HF | TP7-TP3 | −212 ± 363 | −103 ± 437 | −263 ± 301/* | 30 ± 704 |
| [ms2] | TP13-TP7 | −164 ± 569/* | −190 ± 376 | −117 ± 356 | −117 ± 309 |
| TP13-TP3 | −376 ± 715/** | −293 ± 575 | −380 ± 597/** | −87 ± 832 | |
| HF norm | TP7-TP3 | −7.41 ± 10.01/* | −3.99 ± 12.97 | −8.15 ± 14.25 | 1.49 ± 16.09 |
| [%] | TP13-TP7 | 0.82 ± 13.12 | −5.74 ± 14.33/* | −0.48 ± 16.96 | −6.68 ± 9.79 |
| TP13-TP3 | −6.59 ± 13.03/*** | −9.73 ± 15.49/** | −8.64 ± 19.37 | −5.19 ± 19.53 | |
| LF_HF | TP7-TP3 | 25.69 ± 35.47/* | −0.06 ± 58.67 | 14.16 ± 61.91 | −47.15 ± 119.75 |
| [%] | TP13-TP7 | 24.97 ± 96.14 | 74.11 ± 137.90/* | 37.69 ± 119.10 | 88.36 ± 155.50 |
| TP13-TP3 | 50.66 ± 90.15/*** | 74.05 ± 141.10/** | 51.84 ± 123.95 | 41.20 ± 183.26 | |
| SDNN | TP7/TP3 | 4.72 ± 13.14 | 4.02 ± 15.86 | −0.87 ± 15.81 | −1.59 ± 17.65 |
| [ms] | TP13/TP7 | −2.54 ± 22.36 | 0.40 ± 17.59 | 2.66 ± 21.75 | 3.38 ± 17.76 |
| TP13/TP3 | 2.18 ± 18.09 | 4.42 ± 17.32 | 1.79 ± 17.95 | 1.79 ± 16.58 | |
| RMSSD | TP7-TP3 | −3.95 ± 6.07 | −1.68 ± 6.87 | −3.94 ± 4.15/** | −2.49 ± 7.14 |
| [ms] | TP13-TP7 | −5.96 ± 9.98 | −4.16 ± 9.85 | −2.93 ± 9.80 | −4.24 ± 10.12 |
| TP13-TP3 | −9.91 ± 11.75/* | −5.84 ± 10.86/* | −6.87 ± 8.65/** | −6.73 ± 11.49 | |
| HR | TP7-TP3 | 1.12 ± 2.71 | 0.32 ± 2.14 | 0.88 ± 1.81 | 1.12 ± 2.26 |
| [Hz] | TP13-TP7 | 2.03 ± 3.10/* | 2.77 ± 3.96/* | 3.20 ± 2.78/*** | 4.85 ± 3.95/*** |
| TP13-TP3 | 3.15 ± 3.47/*** | 3.09 ± 4.45/*** | 4.08 ± 2.30/*** | 5.97 ± 5.05/*** | |
*p < 0.05, **p < α HRV ( = 0.01), ***p < 0.001.