Exposure to blue light during lunch break: effects on autonomic arousal and behavioral alertness.
BACKGROUND
Exposures to melanopsin-stimulating (melanopic) component-rich blue light enhance arousal level. We examined their effects in office workers. Eight healthy university office workers were exposed to blue and orange lights for 30 min during lunch break on different days. We compared the effects of light color on autonomic arousal level assessed by heart rate variability (HRV) and behavioral alertness by psychomotor vigilance tests (PVT). Heart rate was higher and high-frequency (HF, 0.150.45 Hz) power of HRV was lower during exposure to the blue light than to orange light. No significant difference with light color was observed, however, in any HRV indices during PVT or in PVT performance after light exposure.


SHORT CONCLUSION
Exposure to blue light during lunch break, compared with that to orange light, enhances autonomic arousal during exposure, but has no sustained effect on autonomic arousal or behavioral alertness after exposure.
['Yuda|Emi|E|', 'Ogasawara|Hiroki|H|', 'Yoshida|Yutaka|Y|', 'Hayano|Junichiro|J|http://orcid.org/0000-0002-5340-6325']
D000328:Adult D001288:Attention D001341:Autonomic Nervous System D005260:Female D006339:Heart Rate D006801:Humans D008027:Light D062409:Lunch D008297:Male D011597:Psychomotor Performance D014851:Wakefulness D055815:Young Adult
Blue light Arousal Alertness Orange light Heart rate variability Psychomotor vigilance Melanopsin Non-image forming vision Organic light-emitting diode