Research Article
Effect of Color Light Stimulation Using LED on Sleep Induction Time
Table 2
Change of HRV according to awake-asleep state in case of experiment 1 (
; awake versus asleep).
| | Experiment 1 () | Experiment 2 () | Awake | Asleep | Awake | Asleep |
| Mean R-R (ms) | 862.22 ± 51.47 | 907.87 ± 53.38 | 885.73 ± 42.37 | 931.44 ± 44.28 | SDNN (ms) | 34.82 ± 7.34 | 2.85 ± 6.54 | 0.59 ± 4.42 | 39.41 ± 4.54 | rMSSD (ms) | 1.55 ± 8.66 | 40.91 ± 10.30 | 28.21 ± 5.78 | 37.64 ± 8.15 | pNN50 (%) | 1.96 ± 7.76 | 9.27 ± 9.61 | 9.94 ± 6.67 | 18.46 ± 8.36 | LF/HF ratio (%) | 1.57 ± 0.58 | 1.19 ± 0.28 | 1.63 ± 0.52 | 1.26 ± 0.29 |
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