足部の皮膚性状における部位差と季節差 : 夏用靴下設計のために

Abstract

We aimed to clarify the water content of the stratum corneum （M） and transepidermal water loss （TEWL） in distinct areas of the lower leg and foot to provide insights into the development of summer socks. The participants included thirty women in their 20s with standard proportions. The M value was higher in the big toe than the values in other measurement parts on the plantar aspect of the foot by roughly twofold. The TEWL value on the sole exceeded that of the instep and the lower leg. Additionally, the TEWL values in the anterior（ proximate to the big toe） and posterior（ heel） regions of the sole of foot surpassed those in the midfoot. Our findings did not concur with that from prior reports on seasonal differences. Notably, M values tended to be higher in winter than in summer in many measurement points, likely owing to the heightened emphasis on moisturizing care in recent years. Furthermore, a personalized data analysis revealed a positive correlation between water content and transpiration in many parts.