Impact of Colored Light on Cardiorespiratory Coordination

Table 2

Results of HRV and cardiorespiratory coordination. All values are mean ± SD.

	Daylight	Red light	Daylight	Blue light	Daylight
RR-interval (ms)	1002±149	999±132	992±123	995±1113	986±108
SDNN (ms)	73±31	74±33	79±35	78±33	83±28
VLF (ln ms^2)	6.61±0.75	6.88±0.75	6.99±0.83	7.31±0.75	7.51±0.75
LF (ln ms^2)§§	6.84^∗,#±0.88	6.94^∗±0.98	7.31±1.07	7.18±0.99	7.39±0.77
HF (ln ms^2)§	7.33^#±1.00	7.10±1.00	7.02±1.03	6.91±1.23	6.86±1.06
ln (LF/HF)§§§	−0.24^∗∗,##±0.93	0.12±0.87	0.47±0.91	0.39±0.74	0.64±0.81
𝛼^§§	0.80^∗∗,##,$±0.19	0.94±0.22	1.03±0.23	1.06±0.24	1.08±0.19
Resp. rate (min^−1)	15.5±2.0	15.6±2.0	15.8±2.0	16.4±2.1	16.2±2.8
SD (resp. rate) (min^−1)	2.3±0.9	2.4±1.0	3.0±0.9	3.0±1.2	2.9±1.8
HRR	4.1±1.2	4.2±1.1	4.2±1.2	4.0±1.2	4.2±1.3
PCR	4.1±1.1	4.2±1.1	4.1±1.2	4.0±1.1	4.0±1.1

^§𝑃<0.05, ^§§𝑃<0.01, and ^§§§𝑃<0.001; ^∗𝑃<0.05 versus daylight (end); ^∗∗𝑃<0.01 versus daylight (end); ^#𝑃<0.05 versus daylight (middle); ^##𝑃<0.01 versus daylight (middle); ^$𝑃<0.05 versus blue light.