Article Publish Status: FREE
Abstract Title:

Exposure to blue light during lunch break: effects on autonomic arousal and behavioral alertness.

Abstract Source:

J Physiol Anthropol. 2017 Jul 11 ;36(1):30. Epub 2017 Jul 11. PMID: 28697776

Abstract Author(s):

Emi Yuda, Hiroki Ogasawara, Yutaka Yoshida, Junichiro Hayano

Article Affiliation:

Emi Yuda


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.

Study Type : Human Study
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