AMOREPACIFIC Research and Development Center, Yongin, Korea.
Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.
J Cosmet Dermatol. 2022 Apr;21(4):1656-1665. doi: 10.1111/jocd.14265. Epub 2021 Jun 18.
Blue wavelengths are thought to have an effect on circadian rhythms. Using a smartphone, which emits a 453 nm blue light, can worsen the quality of sleep.
To study the skin changes caused by poor sleep quality induced by smartphone usage.
The participants were 22 Korean women aged 20-39 years, with no sleep problems and a Pittsburgh Sleep Quality Index (PSQI) score of <5. The participants used a smartphone for 2 h before normal sleep hours. The measurement points were as follows: after a good sleep (D0), after bad sleep day 1 (D1), after bad sleep day 3 (D3), and after bad sleep day 7 (D7). The sleep time, wake-up time, shallow sleep rate, and sleeping time duration were recorded using a smartwatch.
The quality of their sleep deteriorated. The average time of falling asleep extended to 2 a.m., which was about 34 min later. Additionally, their skin moisture content decreased, and sebum content increased. Skin desquamation was increased, and skin gloss, transparency, and elasticity decreased mainly on the skin surface.
Sleep quality decreases with smartphone usage among people who do not usually use their smartphones before going to sleep and do not have any sleep problems. The results showed significant changes in skin optics and surface properties when the quality of sleep was degraded for 7 days.
蓝色波长被认为会对昼夜节律产生影响。使用智能手机发出的 453nm 蓝光会恶化睡眠质量。
研究因使用智能手机导致睡眠质量下降而引起的皮肤变化。
参与者为 22 名年龄在 20-39 岁之间、无睡眠问题且匹兹堡睡眠质量指数（PSQI）评分<5 的韩国女性。参与者在正常睡眠时间前使用智能手机 2 小时。测量点如下：良好睡眠后（D0）、第 1 个睡眠质量差的日子后（D1）、第 3 个睡眠质量差的日子后（D3）和第 7 个睡眠质量差的日子后（D7）。使用智能手表记录睡眠时间、醒来时间、浅睡率和睡眠时间。
她们的睡眠质量恶化。入睡平均时间延长至凌晨 2 点，大约延迟了 34 分钟。此外，皮肤水分含量下降，皮脂含量增加。皮肤脱皮增加，皮肤光泽度、透明度和弹性主要在皮肤表面下降。
对于通常不在睡前使用智能手机且没有任何睡眠问题的人来说，使用智能手机会降低睡眠质量。当睡眠质量下降 7 天时，皮肤光学和表面特性会发生明显变化。
