Researchers found that older adults can adapt better to extreme heat through repeated exposure to hot baths. As climate change leads to more intense heat waves, particularly affecting those aged 75 and older, this discovery is vital for helping seniors manage their health during sweltering conditions. The study showed that after seven days of daily 90-minute hot baths at 40°C, older adults demonstrated improved physiological responses similar to younger adults, including quicker sweating and better blood vessel dilation.

This is particularly important as many older adults are more vulnerable to heat-related health issues, such as cardiovascular and kidney complications. The research indicates that with proper acclimation, older individuals can lower their internal body temperature and heart rate during heat exposure, potentially reducing their risk of heat-related illnesses. Given that cities like Montréal could face significantly more hot days in the coming years, finding effective ways for seniors to adapt is crucial for their well-being.

The study involved 31 participants, including both older adults aged 60 to 78 and younger adults aged 21 to 40, and revealed that aging does not necessarily impair the nervous system’s ability to adapt to heat. However, the protocol of daily hot baths was intensive, and future research is needed to determine more practical heat acclimation methods for older adults. This could lead to simpler strategies that help them cope with increasingly frequent heat waves as climate change progresses.

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