Abstract:We recently demonstrated that sweating‐induced hypohydration attenuated whole‐body heat loss (via reduced sweat evaporation) in young but not middle‐aged men during exercise‐heat stress. In that work, we reasoned that this divergent response may stem from an attenuated influence of intravascular osmolality (elevated during hypohydration) on heat dissipation in the middle‐aged. This hypothesis is supported by previous studies showing i) increased osmolality attenuates sweating in young adults and ii) fluid‐regu… Show more
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