Εμφάνιση απλής εγγραφής

dc.creatorNotley S.R., Poirier M.P., Hardcastle S.G., Flouris A.D., Boulay P., Sigal R.J., Kenny G.P.en
dc.date.accessioned2023-01-31T09:40:27Z
dc.date.available2023-01-31T09:40:27Z
dc.date.issued2017
dc.identifier10.1249/MSS.0000000000001342
dc.identifier.issn01959131
dc.identifier.urihttp://hdl.handle.net/11615/77255
dc.description.abstractPurpose This study was designed to determine whether age-related impairments in whole-body heat loss, which are known to exist in dry heat, also occur in humid heat in women. Methods To evaluate this possibility, 10 young (25 ± 4 yr) and 10 older (51 ± 7 yr) women matched for body surface area (young, 1.69 ± 0.11; older, 1.76 ± 0.14 m2, P = 0.21) and peak oxygen consumption (VO2peak) (young, 38.6 ± 4.6; older, 34.8 ± 6.6 mL·kg-1·min-1, P = 0.15) performed four 15-min bouts of cycling at a fixed metabolic heat production rate (300 W; equivalent to 45% VO2peak), each separated by a 15-min recovery, in dry (35°C, 20% relative humidity) and humid heat (35°C, 60% relative humidity). Total heat loss (evaporative ± dry heat exchange) and metabolic heat production were measured using direct and indirect calorimetry, respectively. Body heat storage was measured as the temporal summation of heat production and loss. Results Total heat loss was lower in humid conditions compared with dry conditions during all exercise bouts in both groups (all P < 0.05), resulting in 49% and 39% greater body heat storage in young and older women, respectively (both P < 0.01). Total heat loss was also lower in older women compared with young women during exercise bouts 1, 2 and 3 in dry heat (all P < 0.05) and bouts 1 and 2 in humid heat (both P < 0.05). Consequently, body heat storage was 29% and 16% greater in older women compared with young women in dry and humid conditions, respectively (both P < 0.05). Conclusions Increasing ambient humidity reduces heat loss capacity in young and older women. However, older women display impaired heat loss relative to young women in both dry and humid heat, and may therefore be at greater risk of heat-related injury during light-to-moderate activity. © 2017 by the American College of Sports Medicine.en
dc.language.isoenen
dc.sourceMedicine and Science in Sports and Exerciseen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85031727097&doi=10.1249%2fMSS.0000000000001342&partnerID=40&md5=b998eb2886b1103664abf1eebb922c59
dc.subjectadulten
dc.subjectagingen
dc.subjectcalorimetryen
dc.subjectcontrolled studyen
dc.subjectfemaleen
dc.subjectheart rateen
dc.subjectheaten
dc.subjectheat injuryen
dc.subjecthumanen
dc.subjecthumidityen
dc.subjectmiddle ageden
dc.subjectoxygen consumptionen
dc.subjectphysiologyen
dc.subjectproceduresen
dc.subjectrandomized controlled trialen
dc.subjectrisk factoren
dc.subjectsex factoren
dc.subjectthermometryen
dc.subjectthermoregulationen
dc.subjectAdulten
dc.subjectAgingen
dc.subjectBody Temperature Regulationen
dc.subjectCalorimetryen
dc.subjectFemaleen
dc.subjectHeart Rateen
dc.subjectHeat Stress Disordersen
dc.subjectHot Temperatureen
dc.subjectHumansen
dc.subjectHumidityen
dc.subjectMiddle Ageden
dc.subjectOxygen Consumptionen
dc.subjectRisk Factorsen
dc.subjectSex Factorsen
dc.subjectThermometryen
dc.subjectLippincott Williams and Wilkinsen
dc.titleAging Impairs Whole-Body Heat Loss in Women under Both Dry and Humid Heat Stressen
dc.typejournalArticleen


Αρχεία σε αυτό το τεκμήριο

ΑρχείαΜέγεθοςΤύποςΠροβολή

Δεν υπάρχουν αρχεία που να σχετίζονται με αυτό το τεκμήριο.

Αυτό το τεκμήριο εμφανίζεται στις ακόλουθες συλλογές

Εμφάνιση απλής εγγραφής