Loading…

Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance

It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked...

Full description

Saved in:
Bibliographic Details
Published in:Frontiers in physiology 2016-11, Vol.7, p.564-564
Main Authors: Neal, Rebecca A, Massey, Heather C, Tipton, Michael J, Young, John S, Corbett, Jo
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333
cites cdi_FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333
container_end_page 564
container_issue
container_start_page 564
container_title Frontiers in physiology
container_volume 7
creator Neal, Rebecca A
Massey, Heather C
Tipton, Michael J
Young, John S
Corbett, Jo
description It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked to PV expansion. We investigated: (i) the influence of dehydration on the time-course of acquisition and decay of HA; (ii) whether dehydration augmented any ergogenic benefits in temperate conditions, particularly those related to PV expansion. : Eight males [VO : 56.9(7.2) mL·kg ·min ] undertook two HA programmes (balanced cross-over design), once drinking to maintain euhydration (HA ) and once with restricted fluid-intake (HA ). Days 1, 6, 11, and 18 were 60 min exercise-heat stress tests [HST (40°C; 50% RH)], days 2-5 and 7-10 were 90 min, isothermal-strain ( ~ 38.5°C), exercise-heat sessions. Performance parameters [VO , lactate threshold, efficiency, peak power output (PPO)] were determined pre and post HA by graded exercise test (22°C; 55%RH). : During isothermal-strain sessions hypohydration was achieved in HA and euhydration maintained in HA [average body mass loss -2.71(0.82)% vs. -0.56(0.73)%, < 0.001], but aldosterone concentration, power output, and cardiovascular strain were unaffected by dehydration. HA was evident on day 6 {reduced end-exercise [-0.30(0.27)°C] and exercise heart rate [-12(15) beats.min ], increased PV [+7.2(6.4)%] and sweat-loss [+0.25(0.22) L.h ], < 0.05} with some further adaptations on day 11 {further reduced end-exercise [-0.25(0.19)°C] and exercise heart rate [-3(9) beats.min ], < 0.05}. These adaptations were not notably affected by dehydration and were generally maintained 7-days post HA. Performance parameters were unchanged, apart from increased PPO (+16(20) W, irrespective of condition). : When thermal-strain is matched, permissive dehydration which induces a mild, transient, hypohydration does not affect the acquisition and decay of HA, or endurance performance parameters. Irrespective of hydration, trained individuals require >5 days to optimize HA.
doi_str_mv 10.3389/fphys.2016.00564
format article
fullrecord <record><control><sourceid>proquest_doaj_</sourceid><recordid>TN_cdi_doaj_primary_oai_doaj_org_article_67a13d87e5d44abba31d0f5214bab6dc</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><doaj_id>oai_doaj_org_article_67a13d87e5d44abba31d0f5214bab6dc</doaj_id><sourcerecordid>1847895817</sourcerecordid><originalsourceid>FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333</originalsourceid><addsrcrecordid>eNpVkU1r3DAQhk1paUKae0_Fxx66W31a0qUQ0m2yEGgPKfQmxtIo62BbW8kbuv--Wm8SkkGgkWbeR4PeqvpIyZJzbb6G7Wafl4zQZkmIbMSb6pQ2jVgQwf68fZGfVOc535MSgjBC6PvqhCnDmTH8tIqrENBNdQz1L0xDl3P3gPV33Ox9gqmLY13WevQ7Nx9g9KXoYH8QXCNM9YVzfTfMrV_m8i0OWyxarFf_MLku44EcYhpgdPihehegz3j-uJ9Vv3-sbi-vFzc_r9aXFzcLJ5meFq0PWkneCpCMeWHQBwjCEKZ4wyVyJ5TXgbiWaBCoiTRIQbFgaJCBlzir1keuj3Bvt6mMmPY2Qmfni5juLKSpcz3aRgHlXiuUXghoW-DUkyAZFS20jXeF9e3I2u7aAb3DcUrQv4K-rozdxt7FBytpcYfqAvj8CEjx7w7zZMtHO-x7GDHusqVaKG2kpqq0kmOrSzHnhOH5GUrswXY7224PttvZ9iL59HK8Z8GTyfw_f7Grtg</addsrcrecordid><sourcetype>Open Website</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1847895817</pqid></control><display><type>article</type><title>Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance</title><source>Open Access: PubMed Central</source><creator>Neal, Rebecca A ; Massey, Heather C ; Tipton, Michael J ; Young, John S ; Corbett, Jo</creator><creatorcontrib>Neal, Rebecca A ; Massey, Heather C ; Tipton, Michael J ; Young, John S ; Corbett, Jo</creatorcontrib><description>It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked to PV expansion. We investigated: (i) the influence of dehydration on the time-course of acquisition and decay of HA; (ii) whether dehydration augmented any ergogenic benefits in temperate conditions, particularly those related to PV expansion. : Eight males [VO : 56.9(7.2) mL·kg ·min ] undertook two HA programmes (balanced cross-over design), once drinking to maintain euhydration (HA ) and once with restricted fluid-intake (HA ). Days 1, 6, 11, and 18 were 60 min exercise-heat stress tests [HST (40°C; 50% RH)], days 2-5 and 7-10 were 90 min, isothermal-strain ( ~ 38.5°C), exercise-heat sessions. Performance parameters [VO , lactate threshold, efficiency, peak power output (PPO)] were determined pre and post HA by graded exercise test (22°C; 55%RH). : During isothermal-strain sessions hypohydration was achieved in HA and euhydration maintained in HA [average body mass loss -2.71(0.82)% vs. -0.56(0.73)%, &lt; 0.001], but aldosterone concentration, power output, and cardiovascular strain were unaffected by dehydration. HA was evident on day 6 {reduced end-exercise [-0.30(0.27)°C] and exercise heart rate [-12(15) beats.min ], increased PV [+7.2(6.4)%] and sweat-loss [+0.25(0.22) L.h ], &lt; 0.05} with some further adaptations on day 11 {further reduced end-exercise [-0.25(0.19)°C] and exercise heart rate [-3(9) beats.min ], &lt; 0.05}. These adaptations were not notably affected by dehydration and were generally maintained 7-days post HA. Performance parameters were unchanged, apart from increased PPO (+16(20) W, irrespective of condition). : When thermal-strain is matched, permissive dehydration which induces a mild, transient, hypohydration does not affect the acquisition and decay of HA, or endurance performance parameters. Irrespective of hydration, trained individuals require &gt;5 days to optimize HA.</description><identifier>ISSN: 1664-042X</identifier><identifier>EISSN: 1664-042X</identifier><identifier>DOI: 10.3389/fphys.2016.00564</identifier><identifier>PMID: 27932993</identifier><language>eng</language><publisher>Switzerland: Frontiers Media S.A</publisher><subject>Acclimatization ; fluid ; hydration ; Hypohydration ; Physiology ; thermoregulation</subject><ispartof>Frontiers in physiology, 2016-11, Vol.7, p.564-564</ispartof><rights>Copyright © 2016 Neal, Massey, Tipton, Young and Corbett. 2016 Neal, Massey, Tipton, Young and Corbett</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333</citedby><cites>FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5120118/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5120118/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,724,777,781,882,27905,27906,53772,53774</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27932993$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Neal, Rebecca A</creatorcontrib><creatorcontrib>Massey, Heather C</creatorcontrib><creatorcontrib>Tipton, Michael J</creatorcontrib><creatorcontrib>Young, John S</creatorcontrib><creatorcontrib>Corbett, Jo</creatorcontrib><title>Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance</title><title>Frontiers in physiology</title><addtitle>Front Physiol</addtitle><description>It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked to PV expansion. We investigated: (i) the influence of dehydration on the time-course of acquisition and decay of HA; (ii) whether dehydration augmented any ergogenic benefits in temperate conditions, particularly those related to PV expansion. : Eight males [VO : 56.9(7.2) mL·kg ·min ] undertook two HA programmes (balanced cross-over design), once drinking to maintain euhydration (HA ) and once with restricted fluid-intake (HA ). Days 1, 6, 11, and 18 were 60 min exercise-heat stress tests [HST (40°C; 50% RH)], days 2-5 and 7-10 were 90 min, isothermal-strain ( ~ 38.5°C), exercise-heat sessions. Performance parameters [VO , lactate threshold, efficiency, peak power output (PPO)] were determined pre and post HA by graded exercise test (22°C; 55%RH). : During isothermal-strain sessions hypohydration was achieved in HA and euhydration maintained in HA [average body mass loss -2.71(0.82)% vs. -0.56(0.73)%, &lt; 0.001], but aldosterone concentration, power output, and cardiovascular strain were unaffected by dehydration. HA was evident on day 6 {reduced end-exercise [-0.30(0.27)°C] and exercise heart rate [-12(15) beats.min ], increased PV [+7.2(6.4)%] and sweat-loss [+0.25(0.22) L.h ], &lt; 0.05} with some further adaptations on day 11 {further reduced end-exercise [-0.25(0.19)°C] and exercise heart rate [-3(9) beats.min ], &lt; 0.05}. These adaptations were not notably affected by dehydration and were generally maintained 7-days post HA. Performance parameters were unchanged, apart from increased PPO (+16(20) W, irrespective of condition). : When thermal-strain is matched, permissive dehydration which induces a mild, transient, hypohydration does not affect the acquisition and decay of HA, or endurance performance parameters. Irrespective of hydration, trained individuals require &gt;5 days to optimize HA.</description><subject>Acclimatization</subject><subject>fluid</subject><subject>hydration</subject><subject>Hypohydration</subject><subject>Physiology</subject><subject>thermoregulation</subject><issn>1664-042X</issn><issn>1664-042X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNpVkU1r3DAQhk1paUKae0_Fxx66W31a0qUQ0m2yEGgPKfQmxtIo62BbW8kbuv--Wm8SkkGgkWbeR4PeqvpIyZJzbb6G7Wafl4zQZkmIbMSb6pQ2jVgQwf68fZGfVOc535MSgjBC6PvqhCnDmTH8tIqrENBNdQz1L0xDl3P3gPV33Ox9gqmLY13WevQ7Nx9g9KXoYH8QXCNM9YVzfTfMrV_m8i0OWyxarFf_MLku44EcYhpgdPihehegz3j-uJ9Vv3-sbi-vFzc_r9aXFzcLJ5meFq0PWkneCpCMeWHQBwjCEKZ4wyVyJ5TXgbiWaBCoiTRIQbFgaJCBlzir1keuj3Bvt6mMmPY2Qmfni5juLKSpcz3aRgHlXiuUXghoW-DUkyAZFS20jXeF9e3I2u7aAb3DcUrQv4K-rozdxt7FBytpcYfqAvj8CEjx7w7zZMtHO-x7GDHusqVaKG2kpqq0kmOrSzHnhOH5GUrswXY7224PttvZ9iL59HK8Z8GTyfw_f7Grtg</recordid><startdate>20161123</startdate><enddate>20161123</enddate><creator>Neal, Rebecca A</creator><creator>Massey, Heather C</creator><creator>Tipton, Michael J</creator><creator>Young, John S</creator><creator>Corbett, Jo</creator><general>Frontiers Media S.A</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20161123</creationdate><title>Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance</title><author>Neal, Rebecca A ; Massey, Heather C ; Tipton, Michael J ; Young, John S ; Corbett, Jo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Acclimatization</topic><topic>fluid</topic><topic>hydration</topic><topic>Hypohydration</topic><topic>Physiology</topic><topic>thermoregulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Neal, Rebecca A</creatorcontrib><creatorcontrib>Massey, Heather C</creatorcontrib><creatorcontrib>Tipton, Michael J</creatorcontrib><creatorcontrib>Young, John S</creatorcontrib><creatorcontrib>Corbett, Jo</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>Directory of Open Access Journals</collection><jtitle>Frontiers in physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Neal, Rebecca A</au><au>Massey, Heather C</au><au>Tipton, Michael J</au><au>Young, John S</au><au>Corbett, Jo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance</atitle><jtitle>Frontiers in physiology</jtitle><addtitle>Front Physiol</addtitle><date>2016-11-23</date><risdate>2016</risdate><volume>7</volume><spage>564</spage><epage>564</epage><pages>564-564</pages><issn>1664-042X</issn><eissn>1664-042X</eissn><abstract>It has been suggested that dehydration is an independent stimulus for heat acclimation (HA), possibly through influencing fluid-regulation mechanisms and increasing plasma volume (PV) expansion. There is also some evidence that HA may be ergogenic in temperate conditions and that this may be linked to PV expansion. We investigated: (i) the influence of dehydration on the time-course of acquisition and decay of HA; (ii) whether dehydration augmented any ergogenic benefits in temperate conditions, particularly those related to PV expansion. : Eight males [VO : 56.9(7.2) mL·kg ·min ] undertook two HA programmes (balanced cross-over design), once drinking to maintain euhydration (HA ) and once with restricted fluid-intake (HA ). Days 1, 6, 11, and 18 were 60 min exercise-heat stress tests [HST (40°C; 50% RH)], days 2-5 and 7-10 were 90 min, isothermal-strain ( ~ 38.5°C), exercise-heat sessions. Performance parameters [VO , lactate threshold, efficiency, peak power output (PPO)] were determined pre and post HA by graded exercise test (22°C; 55%RH). : During isothermal-strain sessions hypohydration was achieved in HA and euhydration maintained in HA [average body mass loss -2.71(0.82)% vs. -0.56(0.73)%, &lt; 0.001], but aldosterone concentration, power output, and cardiovascular strain were unaffected by dehydration. HA was evident on day 6 {reduced end-exercise [-0.30(0.27)°C] and exercise heart rate [-12(15) beats.min ], increased PV [+7.2(6.4)%] and sweat-loss [+0.25(0.22) L.h ], &lt; 0.05} with some further adaptations on day 11 {further reduced end-exercise [-0.25(0.19)°C] and exercise heart rate [-3(9) beats.min ], &lt; 0.05}. These adaptations were not notably affected by dehydration and were generally maintained 7-days post HA. Performance parameters were unchanged, apart from increased PPO (+16(20) W, irrespective of condition). : When thermal-strain is matched, permissive dehydration which induces a mild, transient, hypohydration does not affect the acquisition and decay of HA, or endurance performance parameters. Irrespective of hydration, trained individuals require &gt;5 days to optimize HA.</abstract><cop>Switzerland</cop><pub>Frontiers Media S.A</pub><pmid>27932993</pmid><doi>10.3389/fphys.2016.00564</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 1664-042X
ispartof Frontiers in physiology, 2016-11, Vol.7, p.564-564
issn 1664-042X
1664-042X
language eng
recordid cdi_doaj_primary_oai_doaj_org_article_67a13d87e5d44abba31d0f5214bab6dc
source Open Access: PubMed Central
subjects Acclimatization
fluid
hydration
Hypohydration
Physiology
thermoregulation
title Effect of Permissive Dehydration on Induction and Decay of Heat Acclimation, and Temperate Exercise Performance
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-19T12%3A19%3A42IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_doaj_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effect%20of%20Permissive%20Dehydration%20on%20Induction%20and%20Decay%20of%20Heat%20Acclimation,%20and%20Temperate%20Exercise%20Performance&rft.jtitle=Frontiers%20in%20physiology&rft.au=Neal,%20Rebecca%20A&rft.date=2016-11-23&rft.volume=7&rft.spage=564&rft.epage=564&rft.pages=564-564&rft.issn=1664-042X&rft.eissn=1664-042X&rft_id=info:doi/10.3389/fphys.2016.00564&rft_dat=%3Cproquest_doaj_%3E1847895817%3C/proquest_doaj_%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c528t-bdf8753b4a522d49edfaf490273635e3c47d8f0cb08a4e8059e1a72f91f5f3333%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1847895817&rft_id=info:pmid/27932993&rfr_iscdi=true