{"id":13873,"date":"2025-04-24T13:29:41","date_gmt":"2025-04-24T11:29:41","guid":{"rendered":"https:\/\/www.famelab.gr\/?p=13873"},"modified":"2025-10-29T08:58:29","modified_gmt":"2025-10-29T08:58:29","slug":"short-term-warm-water-immersion-for-improving-whole-body-heat-loss-in-older-men","status":"publish","type":"post","link":"https:\/\/famelab.gr\/el\/short-term-warm-water-immersion-for-improving-whole-body-heat-loss-in-older-men\/","title":{"rendered":"Short-Term Warm-Water Immersion for Improving Whole-Body Heat Loss in Older Men"},"content":{"rendered":"<div class=\"citation-text\">Janetos KT, O&#8217;Connor FK, Meade RD, Richards BJ, Koetje NJ, Kirby NV, McCormick JJ, Flouris AD, Kenny GP. Short-Term Warm-Water Immersion for Improving Whole-Body Heat Loss in Older Men. Med Sci Sports Exerc. 2025 Jan 17. doi: 10.1249\/MSS.0000000000003649. Epub ahead of print. PMID: 39820413.<\/div>\n<div><\/div>\n<div><strong>Abstract<\/strong><\/div>\n<div>\n<div id=\"abstract\" class=\"abstract\">\n<div id=\"eng-abstract\" class=\"abstract-content selected\">\n<p><strong class=\"sub-title\"> Purpose: <\/strong> Exercise-induced heat acclimation can mitigate age-related reductions in heat-loss capacity, though performing repeated bouts of strenuous exercise in the heat may be untenable for many older adults. While short-term passive heat acclimation (e.g., \u22647 days of warm-water immersion) enhances whole-body heat loss in young adults, evidence of its efficacy in older adults is lacking. Thus, we examined whether 7-days warm-water immersion would improve whole-body heat loss in older adults.<\/p>\n<p><strong class=\"sub-title\"> Methods: <\/strong> Twelve habitually active older men (median [IQR] age: 68 [64-73] years; peak oxygen uptake (V\u0307O2peak): 34.1 [29.4-36.1] mLO2\u00b7kg-1\u00b7min-1) completed 7 consecutive days of ~90-minutes warm-water immersion (~40 \u00b0C) with core (rectal) temperature clamped at ~38.5 \u00b0C for the final 60 minutes. Before and after the warm-water immersion intervention, whole-body total (evaporative + dry) heat loss was measured via direct calorimetry during three, 30-minute bouts of cycling at increasing fixed rates of metabolic heat production (150, 200, 250 W\u00b7m-2), each separated by 15-minutes rest, in a hot-dry environment (40 \u00b0C, ~13% relative humidity). Rectal temperature and heart rate were measured continuously.<\/p>\n<p><strong class=\"sub-title\"> Results: <\/strong> Following 7 days of warm-water immersion, whole-body total heat loss was elevated by 23 [95% confidence interval: 14, 31] W\u00b7m-2 across exercise bouts (acclimation-effect: P &lt; 0.001; interaction: P = 0.598). This was paralleled by reductions in core temperature and heart rate of 0.3 [0.2, 0.4] \u00b0C and 11 [8, 14] beats\u00b7min-1 (both, acclimation-effect: P &lt; 0.001; interaction: P = 0.288), respectively.<\/p>\n<p><strong class=\"sub-title\"> Conclusions: <\/strong> Seven consecutive days of warm-water immersion improved whole-body heat loss and reduced core temperature and cardiovascular strain across light-to-vigorous intensity exercise in habitually active older men. Passive heat acclimation may be an efficacious alternative to exercise-heat acclimation to improve heat-loss capacity. Studies are warranted to assess effectiveness in more heat-vulnerable populations.<\/p>\n<p style=\"text-align: left;\"><strong>Full Text Link: <\/strong><\/p>\n<p style=\"text-align: left;\"><a href=\"https:\/\/journals.lww.com\/acsm-msse\/abstract\/9900\/short_term_warm_water_immersion_for_improving.709.aspx\"><strong>https:\/\/journals.lww.com\/acsm-msse\/abstract\/9900\/short_term_warm_water_immersion_for_improving.709.aspx<\/strong><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Janetos KT, O&#8217;Connor FK, Meade RD, Richards BJ, Koetje NJ, Kirby NV, McCormick JJ, Flouris AD, Kenny GP. Short-Term Warm-Water Immersion for Improving Whole-Body Heat Loss in Older Men. Med Sci Sports Exerc. 2025 Jan 17. doi: 10.1249\/MSS.0000000000003649. Epub ahead of print. PMID: 39820413. Abstract Purpose: Exercise-induced heat acclimation can mitigate age-related reductions in heat-loss [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-13873","post","type-post","status-publish","format-standard","hentry","category-fame-lab-publications-2025"],"_links":{"self":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/13873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/comments?post=13873"}],"version-history":[{"count":1,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/13873\/revisions"}],"predecessor-version":[{"id":16512,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/13873\/revisions\/16512"}],"wp:attachment":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/media?parent=13873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/categories?post=13873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/tags?post=13873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}