Rate and composition of sweat fluid losses are unaltered by hypohydration during prolonged exercise in horses
Janene K. Kingston 1 , Raymond J. Geor 1 , and Laura Jill McCutcheon 2 Departments of 1 Clinical Studies and 2 Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1 Received 12 April 1996; accepted in final form 6 June 1997. Kingston, Janene K., Raymond J....
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| creator | Kingston, Janene K Geor, Raymond J McCutcheon, Laura Jill |
| description | Janene K.
Kingston 1 ,
Raymond J.
Geor 1 , and
Laura Jill
McCutcheon 2
Departments of 1 Clinical Studies and
2 Pathobiology, Ontario Veterinary College, University
of Guelph, Guelph, Ontario, Canada N1G 2W1
Received 12 April 1996; accepted in final form 6 June 1997.
Kingston, Janene K., Raymond J. Geor, and Laura Jill
McCutcheon. Rate and composition of sweat fluid losses are
unaltered by hypohydration during prolonged exercise in horses.
J. Appl. Physiol. 83(4):
1133-1143, 1997. Rate and ionic composition of sweat fluid losses and partitioning of evaporative heat loss into respiratory and cutaneous components were determined in six horses during three 15-km phases of exercise at ~40% of maximal
O 2 uptake. Pattern of change in
sweat rate (SR) and composition was similar during each phase. SR
increased rapidly for the first 20 min of exercise but remained at
~24-28
ml · m 2 · min 1
during the remainder of each phase. Similarly, the concentrations of Na
and Cl in sweat increased until 30 min of exercise but were unchanged
thereafter. Sweat osmolality and concentrations of Na and Cl were
positively correlated with SR. Sweat K concentration decreased during
exercise but was not correlated with SR. Fluid losses were 33.8 ± 1.5 liters, resulting in decreases of ~21% in plasma volume and
~11% in total body water. The ~6% hypohydration was not
associated with an alteration in SR, sweat composition, or heat
storage. Respiratory and cutaneous evaporative heat loss represented
~23 and 70%, respectively, of the total heat dissipated, and the
partitioning of heat loss was similar in each exercise phase. We
conclude that SR and the relative proportions of respiratory and
cutaneous evaporative heat loss are unchanged in horses during prolonged low-intensity exercise despite moderate hypohydration.
temperature regulation; sweating rate; ion losses; evaporative heat
loss; equine
0161-7567/97 $5.00
Copyright © 1997 the American Physiological Society |
| doi_str_mv | 10.1152/jappl.1997.83.4.1133 |
| format | Article |
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Kingston 1 ,
Raymond J.
Geor 1 , and
Laura Jill
McCutcheon 2
Departments of 1 Clinical Studies and
2 Pathobiology, Ontario Veterinary College, University
of Guelph, Guelph, Ontario, Canada N1G 2W1
Received 12 April 1996; accepted in final form 6 June 1997.
Kingston, Janene K., Raymond J. Geor, and Laura Jill
McCutcheon. Rate and composition of sweat fluid losses are
unaltered by hypohydration during prolonged exercise in horses.
J. Appl. Physiol. 83(4):
1133-1143, 1997. Rate and ionic composition of sweat fluid losses and partitioning of evaporative heat loss into respiratory and cutaneous components were determined in six horses during three 15-km phases of exercise at ~40% of maximal
O 2 uptake. Pattern of change in
sweat rate (SR) and composition was similar during each phase. SR
increased rapidly for the first 20 min of exercise but remained at
~24-28
ml · m 2 · min 1
during the remainder of each phase. Similarly, the concentrations of Na
and Cl in sweat increased until 30 min of exercise but were unchanged
thereafter. Sweat osmolality and concentrations of Na and Cl were
positively correlated with SR. Sweat K concentration decreased during
exercise but was not correlated with SR. Fluid losses were 33.8 ± 1.5 liters, resulting in decreases of ~21% in plasma volume and
~11% in total body water. The ~6% hypohydration was not
associated with an alteration in SR, sweat composition, or heat
storage. Respiratory and cutaneous evaporative heat loss represented
~23 and 70%, respectively, of the total heat dissipated, and the
partitioning of heat loss was similar in each exercise phase. We
conclude that SR and the relative proportions of respiratory and
cutaneous evaporative heat loss are unchanged in horses during prolonged low-intensity exercise despite moderate hypohydration.
temperature regulation; sweating rate; ion losses; evaporative heat
loss; equine
0161-7567/97 $5.00
Copyright © 1997 the American Physiological Society</description><identifier>ISSN: 8750-7587</identifier><identifier>EISSN: 1522-1601</identifier><identifier>DOI: 10.1152/jappl.1997.83.4.1133</identifier><identifier>PMID: 9338421</identifier><identifier>CODEN: JAPHEV</identifier><language>eng</language><publisher>Bethesda, MD: Am Physiological Soc</publisher><subject>Animals ; Biological and medical sciences ; Body Temperature - physiology ; Body Weight - physiology ; Chlorides - metabolism ; Dehydration - metabolism ; Female ; Fundamental and applied biological sciences. Psychology ; Horses ; Male ; Osmolar Concentration ; Physical Exertion - physiology ; Sodium - metabolism ; Sweat - metabolism ; Sweating - physiology ; Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects ; Thorax - anatomy & histology ; Thorax - physiology ; Time Factors ; Vertebrates: anatomy and physiology, studies on body, several organs or systems ; Water Loss, Insensible - physiology</subject><ispartof>Journal of applied physiology (1985), 1997-10, Vol.83 (4), p.1133-1143</ispartof><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c409t-12db566df446981e0d6efbbf69834e573e47c4540ebb561852b951a6ace18a853</citedby><cites>FETCH-LOGICAL-c409t-12db566df446981e0d6efbbf69834e573e47c4540ebb561852b951a6ace18a853</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,3028,27911,27912</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2841366$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/9338421$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kingston, Janene K</creatorcontrib><creatorcontrib>Geor, Raymond J</creatorcontrib><creatorcontrib>McCutcheon, Laura Jill</creatorcontrib><title>Rate and composition of sweat fluid losses are unaltered by hypohydration during prolonged exercise in horses</title><title>Journal of applied physiology (1985)</title><addtitle>J Appl Physiol (1985)</addtitle><description>Janene K.
Kingston 1 ,
Raymond J.
Geor 1 , and
Laura Jill
McCutcheon 2
Departments of 1 Clinical Studies and
2 Pathobiology, Ontario Veterinary College, University
of Guelph, Guelph, Ontario, Canada N1G 2W1
Received 12 April 1996; accepted in final form 6 June 1997.
Kingston, Janene K., Raymond J. Geor, and Laura Jill
McCutcheon. Rate and composition of sweat fluid losses are
unaltered by hypohydration during prolonged exercise in horses.
J. Appl. Physiol. 83(4):
1133-1143, 1997. Rate and ionic composition of sweat fluid losses and partitioning of evaporative heat loss into respiratory and cutaneous components were determined in six horses during three 15-km phases of exercise at ~40% of maximal
O 2 uptake. Pattern of change in
sweat rate (SR) and composition was similar during each phase. SR
increased rapidly for the first 20 min of exercise but remained at
~24-28
ml · m 2 · min 1
during the remainder of each phase. Similarly, the concentrations of Na
and Cl in sweat increased until 30 min of exercise but were unchanged
thereafter. Sweat osmolality and concentrations of Na and Cl were
positively correlated with SR. Sweat K concentration decreased during
exercise but was not correlated with SR. Fluid losses were 33.8 ± 1.5 liters, resulting in decreases of ~21% in plasma volume and
~11% in total body water. The ~6% hypohydration was not
associated with an alteration in SR, sweat composition, or heat
storage. Respiratory and cutaneous evaporative heat loss represented
~23 and 70%, respectively, of the total heat dissipated, and the
partitioning of heat loss was similar in each exercise phase. We
conclude that SR and the relative proportions of respiratory and
cutaneous evaporative heat loss are unchanged in horses during prolonged low-intensity exercise despite moderate hypohydration.
temperature regulation; sweating rate; ion losses; evaporative heat
loss; equine
0161-7567/97 $5.00
Copyright © 1997 the American Physiological Society</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Body Temperature - physiology</subject><subject>Body Weight - physiology</subject><subject>Chlorides - metabolism</subject><subject>Dehydration - metabolism</subject><subject>Female</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Horses</subject><subject>Male</subject><subject>Osmolar Concentration</subject><subject>Physical Exertion - physiology</subject><subject>Sodium - metabolism</subject><subject>Sweat - metabolism</subject><subject>Sweating - physiology</subject><subject>Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects</subject><subject>Thorax - anatomy & histology</subject><subject>Thorax - physiology</subject><subject>Time Factors</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><subject>Water Loss, Insensible - physiology</subject><issn>8750-7587</issn><issn>1522-1601</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kF1r3SAYx6VsdGdtv0ELXoyxm5xp1MRclrJug8JgtNdi4uOJxcRUE9p8-3naw9ludiX6_F8efwhdUrKlVJRfH_U0-S1tmnor2ZbnR8ZO0CaPyoJWhL5DG1kLUtRC1h_Qx5QeCaGcC3qKThvGJC_pBg2_9QxYjwZ3YZhCcrMLIw4Wp2fQM7Z-cQb7kBIkrCPgZdR-hggGtyvu1yn0q4n61WSW6MYdnmLwYdxlBbxA7FwC7Ebch5gjztF7q32Ci8N5hh5uv93f_Cjufn3_eXN9V3ScNHNBS9OKqjKW86qRFIipwLatzRfGQdQMeN1xwQm0WUelKNtGUF3pDqjUUrAz9PktNy_ztECa1eBSB97rEcKSVN2wXCR4FvI3YRfzHyNYNUU36LgqStSesnqlrPaUlWSKqz3lbLs65C_tAOZoOmDN80-HuU6d9jbqMYM4ykrJKauqv-292_XPLoKa-jW5zG-3qtvF-3t4mfcbHJvVZGy2ffm_Lav_WfQPO2-pug</recordid><startdate>19971001</startdate><enddate>19971001</enddate><creator>Kingston, Janene K</creator><creator>Geor, Raymond J</creator><creator>McCutcheon, Laura Jill</creator><general>Am Physiological Soc</general><general>American Physiological Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19971001</creationdate><title>Rate and composition of sweat fluid losses are unaltered by hypohydration during prolonged exercise in horses</title><author>Kingston, Janene K ; Geor, Raymond J ; McCutcheon, Laura Jill</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c409t-12db566df446981e0d6efbbf69834e573e47c4540ebb561852b951a6ace18a853</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Body Temperature - physiology</topic><topic>Body Weight - physiology</topic><topic>Chlorides - metabolism</topic><topic>Dehydration - metabolism</topic><topic>Female</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Horses</topic><topic>Male</topic><topic>Osmolar Concentration</topic><topic>Physical Exertion - physiology</topic><topic>Sodium - metabolism</topic><topic>Sweat - metabolism</topic><topic>Sweating - physiology</topic><topic>Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects</topic><topic>Thorax - anatomy & histology</topic><topic>Thorax - physiology</topic><topic>Time Factors</topic><topic>Vertebrates: anatomy and physiology, studies on body, several organs or systems</topic><topic>Water Loss, Insensible - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kingston, Janene K</creatorcontrib><creatorcontrib>Geor, Raymond J</creatorcontrib><creatorcontrib>McCutcheon, Laura Jill</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of applied physiology (1985)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kingston, Janene K</au><au>Geor, Raymond J</au><au>McCutcheon, Laura Jill</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rate and composition of sweat fluid losses are unaltered by hypohydration during prolonged exercise in horses</atitle><jtitle>Journal of applied physiology (1985)</jtitle><addtitle>J Appl Physiol (1985)</addtitle><date>1997-10-01</date><risdate>1997</risdate><volume>83</volume><issue>4</issue><spage>1133</spage><epage>1143</epage><pages>1133-1143</pages><issn>8750-7587</issn><eissn>1522-1601</eissn><coden>JAPHEV</coden><abstract>Janene K.
Kingston 1 ,
Raymond J.
Geor 1 , and
Laura Jill
McCutcheon 2
Departments of 1 Clinical Studies and
2 Pathobiology, Ontario Veterinary College, University
of Guelph, Guelph, Ontario, Canada N1G 2W1
Received 12 April 1996; accepted in final form 6 June 1997.
Kingston, Janene K., Raymond J. Geor, and Laura Jill
McCutcheon. Rate and composition of sweat fluid losses are
unaltered by hypohydration during prolonged exercise in horses.
J. Appl. Physiol. 83(4):
1133-1143, 1997. Rate and ionic composition of sweat fluid losses and partitioning of evaporative heat loss into respiratory and cutaneous components were determined in six horses during three 15-km phases of exercise at ~40% of maximal
O 2 uptake. Pattern of change in
sweat rate (SR) and composition was similar during each phase. SR
increased rapidly for the first 20 min of exercise but remained at
~24-28
ml · m 2 · min 1
during the remainder of each phase. Similarly, the concentrations of Na
and Cl in sweat increased until 30 min of exercise but were unchanged
thereafter. Sweat osmolality and concentrations of Na and Cl were
positively correlated with SR. Sweat K concentration decreased during
exercise but was not correlated with SR. Fluid losses were 33.8 ± 1.5 liters, resulting in decreases of ~21% in plasma volume and
~11% in total body water. The ~6% hypohydration was not
associated with an alteration in SR, sweat composition, or heat
storage. Respiratory and cutaneous evaporative heat loss represented
~23 and 70%, respectively, of the total heat dissipated, and the
partitioning of heat loss was similar in each exercise phase. We
conclude that SR and the relative proportions of respiratory and
cutaneous evaporative heat loss are unchanged in horses during prolonged low-intensity exercise despite moderate hypohydration.
temperature regulation; sweating rate; ion losses; evaporative heat
loss; equine
0161-7567/97 $5.00
Copyright © 1997 the American Physiological Society</abstract><cop>Bethesda, MD</cop><pub>Am Physiological Soc</pub><pmid>9338421</pmid><doi>10.1152/jappl.1997.83.4.1133</doi><tpages>11</tpages></addata></record> |
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| identifier | ISSN: 8750-7587 |
| ispartof | Journal of applied physiology (1985), 1997-10, Vol.83 (4), p.1133-1143 |
| issn | 8750-7587 1522-1601 |
| language | eng |
| recordid | cdi_pascalfrancis_primary_2841366 |
| source | MEDLINE; American Physiological Society; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Animals Biological and medical sciences Body Temperature - physiology Body Weight - physiology Chlorides - metabolism Dehydration - metabolism Female Fundamental and applied biological sciences. Psychology Horses Male Osmolar Concentration Physical Exertion - physiology Sodium - metabolism Sweat - metabolism Sweating - physiology Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects Thorax - anatomy & histology Thorax - physiology Time Factors Vertebrates: anatomy and physiology, studies on body, several organs or systems Water Loss, Insensible - physiology |
| title | Rate and composition of sweat fluid losses are unaltered by hypohydration during prolonged exercise in horses |
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