AMOREPACIFIC Research and Development Center, Yongin-si, Gyeonggi-do, Korea.
Department of Medicine, Graduate School, Chung-Ang University, Seoul, Korea.
Int J Cosmet Sci. 2021 Jun;43(3):352-358. doi: 10.1111/ics.12702. Epub 2021 May 24.
Although changes in skin depend on the external environment, researchers have performed only a few studies on effect of the actual environment. Most studies have researched skin characterization based on changes in the humidity or temperature.
AIM/OBJECTIVE: This study aimed to evaluate changes in the skin based on the difference in indoor and outdoor temperatures and humidity during summer in South Korea and Southeast Asia.
Twenty-two female participants aged 25-39 years were included. Skin hydration, sebum (cheek, forehead), colour, transparency and pores of the participants were measured after a 30-min exposure to high temperature and high humidity (HTHH) environment and a 30-min exposure to low temperature and low humidity (LTLH) environment. Subsequently, exposure to HTHH environment for 30 min +LTLH environment for 30 min was performed after a total of 1 h and repeated.
Repeated exposure to HTHH and LTLH environments increased the skin's sebum content and haemoglobin index. Additionally, skin elasticity was significantly reduced, with patients in their 30 s showing greater changes than those in their 20 s.
Repeated differences in temperature and humidity cause skin ageing, loosen skin vessels and reduce skin elasticity, thereby leading to skin ageing.
尽管皮肤的变化取决于外部环境，但研究人员仅对实际环境的影响进行了很少的研究。大多数研究都是基于湿度或温度的变化来研究皮肤特征。
目的/目标：本研究旨在评估夏季韩国和东南亚室内外温度和湿度差异对皮肤的影响。
纳入 22 名年龄在 25-39 岁的女性参与者。在高温高湿（HTHH）环境下暴露 30 分钟和低温低湿（LTLH）环境下暴露 30 分钟后，测量参与者的皮肤水分、皮脂（脸颊、额头）、肤色、透明度和毛孔。随后，总共 1 小时后，进行了 HTHH 环境暴露 30 分钟+LTLH 环境暴露 30 分钟的重复暴露。
反复暴露于 HTHH 和 LTLH 环境会增加皮肤的皮脂含量和血红蛋白指数。此外，皮肤弹性明显降低，30 多岁的患者比 20 多岁的患者变化更大。
温度和湿度的反复差异会导致皮肤老化，使皮肤血管松弛，降低皮肤弹性，从而导致皮肤老化。
