{"id":6216,"date":"2014-12-11T12:26:06","date_gmt":"2014-12-11T10:26:06","guid":{"rendered":"https:\/\/www.famelab.gr\/?p=6216"},"modified":"2025-10-30T08:36:27","modified_gmt":"2025-10-30T08:36:27","slug":"aging-impairs-heat-loss-but-when-does-it-matter","status":"publish","type":"post","link":"https:\/\/famelab.gr\/el\/aging-impairs-heat-loss-but-when-does-it-matter\/","title":{"rendered":"Aging impairs heat loss, but when does it matter?"},"content":{"rendered":"<p><span style=\"color: #000000;\"> <a href=\"https:\/\/famelab.gr\/el\/aging-impairs-heat-loss-but-when-does-it-matter\/\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignright wp-image-4167 size-medium\" title=\"FAME Lab - Aging impairs heat loss, but when does it matter?\" src=\"https:\/\/www.famelab.gr\/wp-content\/uploads\/2021\/07\/64-300x183.png\" alt=\"FAME Lab - Aging impairs heat loss, but when does it matter?\" width=\"300\" height=\"183\" \/><\/a>Stapleton JM, Poirier MP, <a href=\"https:\/\/famelab.gr\/el\/people\/\" target=\"_blank\" rel=\"noopener noreferrer\">Flouris AD<\/a>, Boulay P, Sigal RJ, Malcolm J, Kenny GP. Aging impairs heat loss, but when does it matter? J Appl Physiol (1985). 2015 Feb 1;118(3):299-309. doi: 10.1152\/japplphysiol.00722.2014. Epub 2014 Dec 11. PMID: 25505030; PMCID: PMC4312844.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>Abstract:<\/strong><\/span><\/p>\n<p>Aging is associated with an attenuated physiological ability to dissipate heat. However, it remains unclear if age-related impairments in heat dissipation only occur above a certain level of heat stress and whether this response is altered by aerobic fitness.<\/p>\n<p>Therefore, we examined changes in whole body evaporative heat loss (HE) as determined using whole body direct calorimetry in young (n = 10; 21 \u00b1 1 yr), untrained middle-aged (n = 10; 48 \u00b1 5 yr), and older (n = 10; 65 \u00b1 3 yr) males matched for body surface area. We also studied a group of trained middle-aged males (n = 10; 49 \u00b1 5 yr) matched for body surface area with all groups and for aerobic fitness with the young group. Participants performed intermittent aerobic exercise (30-min exercise bouts separated by 15-min rest) in the heat (40\u00b0C and 15% relative humidity) at progressively greater fixed rates of heat production equal to 300 (Ex1), 400 (Ex2), and 500 (Ex3) W.<\/p>\n<p>Results showed that HE was significantly lower in middle-aged untrained (Ex2: 426 \u00b1 34; and Ex3: 497 \u00b1 17 W) and older (Ex2: 424 \u00b1 38; and Ex3: 485 \u00b1 44 W) compared with young (Ex2: 472 \u00b1 42; and Ex3: 558 \u00b1 51 W) and middle-aged trained (474 \u00b1 21; Ex3: 552 \u00b1 23 W) males at the end of Ex2 and Ex3 (P &lt; 0.05). No differences among groups were observed during recovery. We conclude that impairments in HE in older and middle-aged untrained males occur at exercise-induced heat loads of \u2265400 W when performed in a hot environment. These impairments in untrained middle-aged males can be minimized through regular aerobic exercise training.<\/p>\n<p><span style=\"color: #000000;\"><strong>Full Text Link: <\/strong><\/span><\/p>\n<p><a href=\"https:\/\/journals.physiology.org\/doi\/pdf\/10.1152\/japplphysiol.00722.2014\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/journals.physiology.org\/doi\/pdf\/10.1152\/japplphysiol.00722.2014<\/a><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-8302 size-full\" src=\"https:\/\/www.famelab.gr\/wp-content\/uploads\/2021\/11\/Line.png\" alt=\"\" width=\"1316\" height=\"1\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Stapleton JM, Poirier MP, Flouris AD, Boulay P, Sigal RJ, Malcolm J, Kenny GP. Aging impairs heat loss, but when does it matter? J Appl Physiol (1985). 2015 Feb 1;118(3):299-309. doi: 10.1152\/japplphysiol.00722.2014. Epub 2014 Dec 11. PMID: 25505030; PMCID: PMC4312844. Abstract: Aging is associated with an attenuated physiological ability to dissipate heat. However, it remains [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[],"class_list":["post-6216","post","type-post","status-publish","format-standard","hentry","category-fame-lab-publications-2015"],"_links":{"self":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/6216","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=6216"}],"version-history":[{"count":1,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/6216\/revisions"}],"predecessor-version":[{"id":16639,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/6216\/revisions\/16639"}],"wp:attachment":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/media?parent=6216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/categories?post=6216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/tags?post=6216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}