Eighty-four hours of sustained operations alter thermoregulation during cold exposure
PURPOSE; This study examined the effects of short-term (3.5 d) sustained military operations (SUSOPS) on thermoregulatory responses to cold stress. Ten men (22.8 +/- 1.4 yr) were assessed during a cold-air test (CAT) after a control week (control) and again after an 84-h SUSOPS (sleep = 2 h.d (-1),...
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| Veröffentlicht in: | Medicine and science in sports and exercise 2003, Vol.35 (1), p.175-181 |
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| creator | CASTELLANI, John W STULZ, Dean A DEGROOT, David W BLANCHARD, Laurie A CADARETTE, Bruce S NINDL, Bradley C MONTAIN, Scott J |
| description | PURPOSE; This study examined the effects of short-term (3.5 d) sustained military operations (SUSOPS) on thermoregulatory responses to cold stress.
Ten men (22.8 +/- 1.4 yr) were assessed during a cold-air test (CAT) after a control week (control) and again after an 84-h SUSOPS (sleep = 2 h.d (-1), energy intake = approximately 1650 kcal.d(-1), and energy expenditure = approximately 4500 kcal.d(-1). CAT consisted of a resting subject (seminude) being exposed to an ambient temperature ramp from 25 degrees C to 10 degrees C during the initial 30 min of CAT, with the ambient temperature then remaining at 10 degrees C for an additional 150 min.
SUSOPS decreased (P< 0.05) body weight, % body fat, and fat-free mass by 3.9 kg, 1.6%, and 1.8 kg, respectively. During CAT, rectal temperature decreased to a greater extent (P< 0.05) after SUSOPS (0.52 +/- 0.09 degrees C) versus control (0.45 +/- 0.12 degrees C). Metabolic heat production was lower (P< 0.05) after SUSOPS at min 30 (55.4 +/- 3.3 W.m (-2)) versus control (66.9 +/- 4.4 W.m(-2)). Examination of the mean body temperature-metabolic heat production relationship indicated that the threshold for shivering was lower (P< 0.05) after SUSOPS (34.8 +/- 0.2 degrees C) versus control (35.8 +/- 0.2 degrees C). Mean weighted skin temperatures ( degrees C) were lower during the initial 1.5 h of CAT in SUSOPS versus control. Heat debt was similar between trials.
These results indicate that sustained (84-h) military operations leads to greater declines in core temperature, due to either a lag in the initial shivering response or heat redistribution secondary to an insulative acclimation. |
| doi_str_mv | 10.1097/00005768-200301000-00026 |
| format | Article |
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Ten men (22.8 +/- 1.4 yr) were assessed during a cold-air test (CAT) after a control week (control) and again after an 84-h SUSOPS (sleep = 2 h.d (-1), energy intake = approximately 1650 kcal.d(-1), and energy expenditure = approximately 4500 kcal.d(-1). CAT consisted of a resting subject (seminude) being exposed to an ambient temperature ramp from 25 degrees C to 10 degrees C during the initial 30 min of CAT, with the ambient temperature then remaining at 10 degrees C for an additional 150 min.
SUSOPS decreased (P< 0.05) body weight, % body fat, and fat-free mass by 3.9 kg, 1.6%, and 1.8 kg, respectively. During CAT, rectal temperature decreased to a greater extent (P< 0.05) after SUSOPS (0.52 +/- 0.09 degrees C) versus control (0.45 +/- 0.12 degrees C). Metabolic heat production was lower (P< 0.05) after SUSOPS at min 30 (55.4 +/- 3.3 W.m (-2)) versus control (66.9 +/- 4.4 W.m(-2)). Examination of the mean body temperature-metabolic heat production relationship indicated that the threshold for shivering was lower (P< 0.05) after SUSOPS (34.8 +/- 0.2 degrees C) versus control (35.8 +/- 0.2 degrees C). Mean weighted skin temperatures ( degrees C) were lower during the initial 1.5 h of CAT in SUSOPS versus control. Heat debt was similar between trials.
These results indicate that sustained (84-h) military operations leads to greater declines in core temperature, due to either a lag in the initial shivering response or heat redistribution secondary to an insulative acclimation.</description><identifier>ISSN: 0195-9131</identifier><identifier>EISSN: 1530-0315</identifier><identifier>DOI: 10.1097/00005768-200301000-00026</identifier><identifier>PMID: 12544652</identifier><identifier>CODEN: MSPEDA</identifier><language>eng</language><publisher>Hagerstown, MD: Lippincott Williams & Wilkins</publisher><subject>Adult ; Biological and medical sciences ; Body Composition ; Body Temperature Regulation - physiology ; Cold Temperature ; Energy Intake ; Fundamental and applied biological sciences. Psychology ; Humans ; Male ; Military Personnel ; Shivering - physiology ; Skin Temperature ; Sleep Deprivation - physiopathology ; Space life sciences ; Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects ; Time Factors ; United States ; Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><ispartof>Medicine and science in sports and exercise, 2003, Vol.35 (1), p.175-181</ispartof><rights>2003 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c422t-7540e3db283be307f151b60e1398e286a9f3cbf9830bc3ebd2d57a10c9eea6263</citedby><cites>FETCH-LOGICAL-c422t-7540e3db283be307f151b60e1398e286a9f3cbf9830bc3ebd2d57a10c9eea6263</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,4010,27904,27905,27906</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14470208$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12544652$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>CASTELLANI, John W</creatorcontrib><creatorcontrib>STULZ, Dean A</creatorcontrib><creatorcontrib>DEGROOT, David W</creatorcontrib><creatorcontrib>BLANCHARD, Laurie A</creatorcontrib><creatorcontrib>CADARETTE, Bruce S</creatorcontrib><creatorcontrib>NINDL, Bradley C</creatorcontrib><creatorcontrib>MONTAIN, Scott J</creatorcontrib><title>Eighty-four hours of sustained operations alter thermoregulation during cold exposure</title><title>Medicine and science in sports and exercise</title><addtitle>Med Sci Sports Exerc</addtitle><description>PURPOSE; This study examined the effects of short-term (3.5 d) sustained military operations (SUSOPS) on thermoregulatory responses to cold stress.
Ten men (22.8 +/- 1.4 yr) were assessed during a cold-air test (CAT) after a control week (control) and again after an 84-h SUSOPS (sleep = 2 h.d (-1), energy intake = approximately 1650 kcal.d(-1), and energy expenditure = approximately 4500 kcal.d(-1). CAT consisted of a resting subject (seminude) being exposed to an ambient temperature ramp from 25 degrees C to 10 degrees C during the initial 30 min of CAT, with the ambient temperature then remaining at 10 degrees C for an additional 150 min.
SUSOPS decreased (P< 0.05) body weight, % body fat, and fat-free mass by 3.9 kg, 1.6%, and 1.8 kg, respectively. During CAT, rectal temperature decreased to a greater extent (P< 0.05) after SUSOPS (0.52 +/- 0.09 degrees C) versus control (0.45 +/- 0.12 degrees C). Metabolic heat production was lower (P< 0.05) after SUSOPS at min 30 (55.4 +/- 3.3 W.m (-2)) versus control (66.9 +/- 4.4 W.m(-2)). Examination of the mean body temperature-metabolic heat production relationship indicated that the threshold for shivering was lower (P< 0.05) after SUSOPS (34.8 +/- 0.2 degrees C) versus control (35.8 +/- 0.2 degrees C). Mean weighted skin temperatures ( degrees C) were lower during the initial 1.5 h of CAT in SUSOPS versus control. Heat debt was similar between trials.
These results indicate that sustained (84-h) military operations leads to greater declines in core temperature, due to either a lag in the initial shivering response or heat redistribution secondary to an insulative acclimation.</description><subject>Adult</subject><subject>Biological and medical sciences</subject><subject>Body Composition</subject><subject>Body Temperature Regulation - physiology</subject><subject>Cold Temperature</subject><subject>Energy Intake</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Male</subject><subject>Military Personnel</subject><subject>Shivering - physiology</subject><subject>Skin Temperature</subject><subject>Sleep Deprivation - physiopathology</subject><subject>Space life sciences</subject><subject>Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects</subject><subject>Time Factors</subject><subject>United States</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><issn>0195-9131</issn><issn>1530-0315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE1r3DAQhkVoyG4-_kLRpb05ndFYsnUsIWkDgV6Ss5Hl8a6D19pKNjT_vspm2xwzoBEjnncEjxAS4RrBVt8gl65MXSgAAsxTkY8yJ2KNmvJAqD-JNaDVhUXClThP6TkjFRGeiRUqXZZGq7V4uh022_ml6MMS5Ta3JEMv05JmN0zcybDn6OYhTEm6ceYo5y3HXYi8WcbDu-yWOEwb6cPYSf6zD2mJfClOezcmvjreF-Lp7vbx5mfx8OvH_c33h8KXSs1FpUtg6lpVU8sEVY8aWwOMZGtWtXG2J9_2tiZoPXHbqU5XDsFbZmeUoQvx9W3vPobfC6e52Q3J8zi6icOSmkpZQwboQxBrYxC0zWD9BvoYUorcN_s47Fx8aRCaV_fNP_fNf_fNwX2Ofj7-sbQ77t6DR9kZ-HIEXPJu7KOb_JDeubKsQEFNfwEDXIz5</recordid><startdate>2003</startdate><enddate>2003</enddate><creator>CASTELLANI, John W</creator><creator>STULZ, Dean A</creator><creator>DEGROOT, David W</creator><creator>BLANCHARD, Laurie A</creator><creator>CADARETTE, Bruce S</creator><creator>NINDL, Bradley C</creator><creator>MONTAIN, Scott J</creator><general>Lippincott Williams & Wilkins</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>7TS</scope><scope>7X8</scope></search><sort><creationdate>2003</creationdate><title>Eighty-four hours of sustained operations alter thermoregulation during cold exposure</title><author>CASTELLANI, John W ; STULZ, Dean A ; DEGROOT, David W ; BLANCHARD, Laurie A ; CADARETTE, Bruce S ; NINDL, Bradley C ; MONTAIN, Scott J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c422t-7540e3db283be307f151b60e1398e286a9f3cbf9830bc3ebd2d57a10c9eea6263</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Adult</topic><topic>Biological and medical sciences</topic><topic>Body Composition</topic><topic>Body Temperature Regulation - physiology</topic><topic>Cold Temperature</topic><topic>Energy Intake</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Male</topic><topic>Military Personnel</topic><topic>Shivering - physiology</topic><topic>Skin Temperature</topic><topic>Sleep Deprivation - physiopathology</topic><topic>Space life sciences</topic><topic>Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects</topic><topic>Time Factors</topic><topic>United States</topic><topic>Vertebrates: anatomy and physiology, studies on body, several organs or systems</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>CASTELLANI, John W</creatorcontrib><creatorcontrib>STULZ, Dean A</creatorcontrib><creatorcontrib>DEGROOT, David W</creatorcontrib><creatorcontrib>BLANCHARD, Laurie A</creatorcontrib><creatorcontrib>CADARETTE, Bruce S</creatorcontrib><creatorcontrib>NINDL, Bradley C</creatorcontrib><creatorcontrib>MONTAIN, Scott J</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>Physical Education Index</collection><collection>MEDLINE - Academic</collection><jtitle>Medicine and science in sports and exercise</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>CASTELLANI, John W</au><au>STULZ, Dean A</au><au>DEGROOT, David W</au><au>BLANCHARD, Laurie A</au><au>CADARETTE, Bruce S</au><au>NINDL, Bradley C</au><au>MONTAIN, Scott J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Eighty-four hours of sustained operations alter thermoregulation during cold exposure</atitle><jtitle>Medicine and science in sports and exercise</jtitle><addtitle>Med Sci Sports Exerc</addtitle><date>2003</date><risdate>2003</risdate><volume>35</volume><issue>1</issue><spage>175</spage><epage>181</epage><pages>175-181</pages><issn>0195-9131</issn><eissn>1530-0315</eissn><coden>MSPEDA</coden><abstract>PURPOSE; This study examined the effects of short-term (3.5 d) sustained military operations (SUSOPS) on thermoregulatory responses to cold stress.
Ten men (22.8 +/- 1.4 yr) were assessed during a cold-air test (CAT) after a control week (control) and again after an 84-h SUSOPS (sleep = 2 h.d (-1), energy intake = approximately 1650 kcal.d(-1), and energy expenditure = approximately 4500 kcal.d(-1). CAT consisted of a resting subject (seminude) being exposed to an ambient temperature ramp from 25 degrees C to 10 degrees C during the initial 30 min of CAT, with the ambient temperature then remaining at 10 degrees C for an additional 150 min.
SUSOPS decreased (P< 0.05) body weight, % body fat, and fat-free mass by 3.9 kg, 1.6%, and 1.8 kg, respectively. During CAT, rectal temperature decreased to a greater extent (P< 0.05) after SUSOPS (0.52 +/- 0.09 degrees C) versus control (0.45 +/- 0.12 degrees C). Metabolic heat production was lower (P< 0.05) after SUSOPS at min 30 (55.4 +/- 3.3 W.m (-2)) versus control (66.9 +/- 4.4 W.m(-2)). Examination of the mean body temperature-metabolic heat production relationship indicated that the threshold for shivering was lower (P< 0.05) after SUSOPS (34.8 +/- 0.2 degrees C) versus control (35.8 +/- 0.2 degrees C). Mean weighted skin temperatures ( degrees C) were lower during the initial 1.5 h of CAT in SUSOPS versus control. Heat debt was similar between trials.
These results indicate that sustained (84-h) military operations leads to greater declines in core temperature, due to either a lag in the initial shivering response or heat redistribution secondary to an insulative acclimation.</abstract><cop>Hagerstown, MD</cop><pub>Lippincott Williams & Wilkins</pub><pmid>12544652</pmid><doi>10.1097/00005768-200301000-00026</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Medicine and science in sports and exercise, 2003, Vol.35 (1), p.175-181 |
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| source | MEDLINE; Journals@Ovid LWW Legacy Archive; Journals@Ovid Ovid Autoload |
| subjects | Adult Biological and medical sciences Body Composition Body Temperature Regulation - physiology Cold Temperature Energy Intake Fundamental and applied biological sciences. Psychology Humans Male Military Personnel Shivering - physiology Skin Temperature Sleep Deprivation - physiopathology Space life sciences Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects Time Factors United States Vertebrates: anatomy and physiology, studies on body, several organs or systems |
| title | Eighty-four hours of sustained operations alter thermoregulation during cold exposure |
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