Heatstroke prevention: Sauna acclimatization and handheld fan risks

Medical experts are highlighting heat acclimatization as a key strategy for managing extreme heat. Dr. Yusuke Kato, representative director of the Japan Sauna Society, suggests that using saunas to gradually expose the body to heat can help the body adapt, making it easier to sweat and regulate temperature effectively.

However, recent survey data from Looop reveals potential risks in common cooling methods. A study of 1,110 adults in Japan found that 66.1% were unaware that using handheld fans in outdoor temperatures exceeding 35°C can actually increase heatstroke risk by blowing hot air onto the body and accelerating dehydration.

The survey also noted a trend of 'heatstroke prevention poverty,' where individuals purchase cooling goods to save on electricity costs but find the total expenditure higher than simply using air conditioning. Additionally, 34% of respondents expressed concern that elderly relatives might be avoiding air conditioning to save money, increasing their vulnerability to heat-related illnesses.