{"id":5263,"date":"2019-11-04T11:26:50","date_gmt":"2019-11-04T09:26:50","guid":{"rendered":"https:\/\/www.famelab.gr\/?p=5263"},"modified":"2025-10-30T08:03:32","modified_gmt":"2025-10-30T08:03:32","slug":"age-related-reductions-in-heart-rate-variability-do-not-worsen-during-exposure-to-humid-compared-to-dry-heat-a-secondary-analysis","status":"publish","type":"post","link":"https:\/\/famelab.gr\/el\/age-related-reductions-in-heart-rate-variability-do-not-worsen-during-exposure-to-humid-compared-to-dry-heat-a-secondary-analysis\/","title":{"rendered":"Age-related reductions in heart rate variability do not worsen during exposure to humid compared to dry heat: a secondary analysis"},"content":{"rendered":"

\"FAME<\/a>Carrillo AE<\/a>, Flouris AD<\/a>, Herry CL, Notley SR, Macartney MJ, Seely AJE, Wright Beatty HE, Kenny GP. Age-related reductions in heart rate variability do not worsen during exposure to humid compared to dry heat: A secondary analysis. Temperature (Austin). 2019 Nov 4;6(4):341-345. doi: 10.1080\/23328940.2019.1684791. PMID: 31934605; PMCID: PMC6949029.<\/span><\/p>\n

Abstract:\u00a0<\/strong><\/span><\/p>\n

We conducted a secondary analysis to investigate whether age-related attenuations in heart rate variability (HRV) worsen during exposure to moderate, dry (36.5\u00b0C, 20% RH) or humid (36.5\u00b0C, 60% RH) heat conditions that resulted in greater body heat storage among older compared to young participants, and during humid compared to dry heat, regardless of age. Six HRV indices [heart rate (HR), coefficient of variation (CoV), detrended fluctuation analysis: \u03b11, low frequency power, high frequency power, and low\/high frequency ratio] were assessed in 10 young (21 \u00b1 3 y) and 9 older (65 \u00b1 5 y) adults for 15-min prior to (baseline), and at the end of a 120-min exposure to dry and humid heat while seated at rest.<\/p>\n

Our results demonstrated a condition (dry and humid) x time (baseline and end) interaction effect on HR (p = 0.047) such that HR gradually increased during humid heat exposure yet remained similar during dry heat exposure across groups. We also found an age-related attenuation in CoV at baseline for both the dry (young: 0.097 \u00b1 0.023%; older: 0.054 \u00b1 0.016%) and humid (young: 0.093 \u00b1 0.034%; older: 0.056 \u00b1 0.014%) heat conditions (p < 0.02). Those age-related attenuations in CoV, however, were not magnified throughout the exposure nor different between conditions (p > 0.05). While older adults stored more heat during a brief 120-min exposure to dry heat compared to their young counterparts, this was not paralleled by further age-related impairments in HRV even when body heat storage and cardiovascular strain were exacerbated by exposure to humid heat.<\/p>\n

Full Text Link: <\/strong><\/span><\/p>\n

https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/23328940.2019.1684791<\/a><\/p>\n

Download PDF:<\/strong><\/span><\/p>\n

https:\/\/www.famelab.gr\/wp-content\/uploads\/2022\/04\/Age-related-reductions-in-heart-rate-variability-do-not-worsen-during-exposure-to-humid-compared-to-dry-heat-a-secondary-analysis_2019.pdf<\/a><\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Carrillo AE, Flouris AD, Herry CL, Notley SR, Macartney MJ, Seely AJE, Wright Beatty HE, Kenny GP. Age-related reductions in heart rate variability do not worsen during exposure to humid compared to dry heat: A secondary analysis. Temperature (Austin). 2019 Nov 4;6(4):341-345. doi: 10.1080\/23328940.2019.1684791. PMID: 31934605; PMCID: PMC6949029. Abstract:\u00a0 We conducted a secondary analysis to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40],"tags":[],"class_list":["post-5263","post","type-post","status-publish","format-standard","hentry","category-fame-lab-publications-2019"],"_links":{"self":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/5263","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=5263"}],"version-history":[{"count":1,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/5263\/revisions"}],"predecessor-version":[{"id":16563,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/posts\/5263\/revisions\/16563"}],"wp:attachment":[{"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/media?parent=5263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/categories?post=5263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/famelab.gr\/el\/wp-json\/wp\/v2\/tags?post=5263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}