Temperature最新文献_第9页

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Temperature Pub Date : 2023-04-03 DOI: 10.1016/b978-0-12-336156-1.50007-0

E. Ostby

引用次数: 0

Elevations in serum brain-derived neurotrophic factor following occupational heat stress are not influenced by age or common chronic disease. 职业热应激后血清脑源性神经营养因子的升高不受年龄或常见慢性病的影响

Temperature Pub Date : 2023-02-23 eCollection Date: 2023-01-01 DOI: 10.1080/23328940.2023.2176107

Nicholas Goulet, James J McCormick, Kelli E King, Sean R Notley, Gary S Goldfield, Naoto Fujii, Tatsuro Amano, Glen P Kenny

{"title":"Elevations in serum brain-derived neurotrophic factor following occupational heat stress are not influenced by age or common chronic disease.","authors":"Nicholas Goulet, James J McCormick, Kelli E King, Sean R Notley, Gary S Goldfield, Naoto Fujii, Tatsuro Amano, Glen P Kenny","doi":"10.1080/23328940.2023.2176107","DOIUrl":"10.1080/23328940.2023.2176107","url":null,"abstract":"With global warming, workers are increasingly exposed to strenuous occupations in hot environments. Given age- and disease-associated declines in thermoregulatory function, older workers are at an elevated risk of developing heat-related injuries. Brain-derived neurotrophic factor (BDNF) is thought to confer neuroprotection during acute exercise, however, the influence of environmental heat on BDNF responses during prolonged work remains unclear. Therefore, we evaluated serum BDNF concentrations before and after 180 min of moderate-intensity treadmill walking (200 W/m2) and after 60 min of post-exercise recovery in temperate (wet-bulb globe temperature (WBGT) 16°C) and hot (WBGT 32°C) environments in 13 healthy young men (mean [SD; 22 [3] years), 12 healthy older men (59 [4] years), 10 men with hypertension (HTN) (60 [4] years), and 9 men with type 2 diabetes (T2D) (60 [5] years). In the temperate condition, all but one participant (1 HTN) completed the 180 min of exercise. While exercise tolerance in the heat was lower in older men with HTN (117 min [45]) and T2D (123 min [42]) compared to healthy older men (159 min [31]) (both p ≤ 0.049), similar end-exercise rectal temperatures (38.9°C [0.4]) were observed across groups, paralleled by similar elevations in serum BDNF across groups at end-exercise (+1106 pg/mL [203]) and end-recovery (+938 pg/mL [146]; all p ≤ 0.01) in the heat. No changes in serum BDNF were observed in the temperate condition. Our findings indicate similar BDNF responses in individuals with HTN or T2D compared to their healthy counterparts, despite exhibiting reduced tolerance to heat.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"454-464"},"PeriodicalIF":0.0,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10732602/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47346735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hot water immersion acutely reduces peripheral glucose uptake in young healthy males: An exploratory crossover randomized controlled trial. 热水浸泡可显著降低年轻健康男性的外周血糖摄取：一项探索性交叉随机对照试验

Temperature Pub Date : 2023-01-08 eCollection Date: 2023-01-01 DOI: 10.1080/23328940.2022.2161242

Matthew J Maley, Andrew P Hunt, Ian B Stewart, Steven Weier, Justin Holland, Christof A Leicht, Geoffrey M Minett

{"title":"Hot water immersion acutely reduces peripheral glucose uptake in young healthy males: An exploratory crossover randomized controlled trial.","authors":"Matthew J Maley, Andrew P Hunt, Ian B Stewart, Steven Weier, Justin Holland, Christof A Leicht, Geoffrey M Minett","doi":"10.1080/23328940.2022.2161242","DOIUrl":"10.1080/23328940.2022.2161242","url":null,"abstract":"Whether glucose concentration increases during heat exposure because of reduced peripheral tissue uptake or enhanced appearance is currently unknown. This study aimed to report glucose concentrations in both capillary and venous blood in response to a glucose challenge during passive heating (PH) to assess whether heat exposure affects glucose uptake in healthy males. Twelve healthy male participants completed two experimental sessions, where they were asked to undertake an oral glucose tolerance test (OGTT) whilst immersed in thermoneutral (CON, 35.9 (0.6) °C) and hot water (HWI, 40.3 (0.5) °C) for 120 min. Venous and capillary blood [glucose], rectal temperature, and heart rate were recorded. [Glucose] area under the curve for HWI venous (907 (104) AU) differed from CON venous (719 (88) AU, all P < 0.001). No other differences were noted (P > 0.05). Compared with CON, HWI resulted in greater rectal temperature (37.1 (0.3) °C versus 38.6 (0.4) °C, respectively) and heart rate (69 (12) bpm versus 108 (11) bpm, respectively) on cessation (P < 0.001). An OGTT results in similar capillary [glucose] during hot and thermoneutral water immersion, whereas venous [glucose] was greater during HWI when compared with CON. This indicates that peripheral tissue glucose uptake is acutely reduced in response to HWI. Abbreviations: AUC: Area under the curve; CON: Thermoneutral immersion trial; HWI: Hot water immersion trial; OGTT: Oral glucose tolerance test; PH: Passive heating; <math><mrow><msub><mover><mi>T</mi><mo>-</mo></mover><mrow><mrow><mrow><mi>m</mi><mi>s</mi><mi>k</mi></mrow></mrow></mrow></msub></mrow></math>: Mean skin temperature; Trec: Rectal temperature.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"434-443"},"PeriodicalIF":0.0,"publicationDate":"2023-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10732630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45472801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The effectiveness of heat preparation and alleviation strategies for cognitive performance: A systematic review. 热准备和缓解策略对认知表现的有效性：一项系统综述

Temperature Pub Date : 2023-01-04 eCollection Date: 2023-01-01 DOI: 10.1080/23328940.2022.2157645

Kate J Donnan, Emily L Williams, Melissa J Bargh

{"title":"The effectiveness of heat preparation and alleviation strategies for cognitive performance: A systematic review.","authors":"Kate J Donnan, Emily L Williams, Melissa J Bargh","doi":"10.1080/23328940.2022.2157645","DOIUrl":"10.1080/23328940.2022.2157645","url":null,"abstract":"A range of occupational and performance contexts (e.g. military personnel operations, emergency services, sport) require the critical maintenance of cognitive performance in environmentally challenging environments. Several reviews exist which evaluate the effectiveness of heat preparation strategies to facilitate physical performance. To date, no review has explored the usefulness of heat preparation strategies for cognitive performance. Therefore, this systematic review aimed to evaluate a range of interventions for the maintenance of cognitive performance, during or following active or passive heat exposure. Studies to be included were assessed by two authors reviewing title, abstract, and full-text. Forty articles were identified which met the inclusion criteria. Interventions were categorised into chronic (i.e. acclimation/acclimatisation) and acute strategies (i.e. hydration, cooling, supplementation, psychological). The results indicate that medium-term consecutive heat acclimation may mitigate some cognitive deficits under heat stress, although heat acclimation effectiveness could be influenced by age. Further, pre-cooling appears the most effective cooling method for maintaining cognitive performance under heat stress, although results were somewhat ambiguous. The hydration literature showed that the most effective hydration strategies were those which individualised electrolyte fortified fluid volumes to match for sweat loss. Limited research exploring psychological interventions indicates that motivational self-talk could be facilitative for maintaining cognitive skills following exercise in hot conditions. These findings can be used to help inform strategies for maintaining critical cognitive and decision-making skills in hot environments.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"404-433"},"PeriodicalIF":0.0,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10732620/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46908327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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About the cover. 关于封面。

Temperature Pub Date : 2022-10-30 eCollection Date: 2022-01-01 DOI: 10.1080/23328940.2022.2137207

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About the cover. 关于封面。

Temperature Pub Date : 2022-09-30 DOI: 10.1080/23328940.2022.2129144

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Working in a warming world: Translating thermal physiology to policy-relevant information. 在变暖的世界中工作：将热生理学转化为政策相关信息。

Temperature Pub Date : 2022-09-30 eCollection Date: 2022-01-01 DOI: 10.1080/23328940.2022.2086414

Andreas D Flouris, Leonidas G Ioannou, Lars Nybo

引用次数: 0

Indicators to assess physiological heat strain - Part 1: Systematic review. 生理热负荷评估指标 - 第 1 部分：系统回顾。

Temperature Pub Date : 2022-07-31 eCollection Date: 2022-01-01 DOI: 10.1080/23328940.2022.2037376

Leonidas G Ioannou, Konstantinos Mantzios, Lydia Tsoutsoubi, Sean R Notley, Petros C Dinas, Matt Brearley, Yoram Epstein, George Havenith, Michael N Sawka, Peter Bröde, Igor B Mekjavic, Glen P Kenny, Thomas E Bernard, Lars Nybo, Andreas D Flouris

{"title":"Indicators to assess physiological heat strain - Part 1: Systematic review.","authors":"Leonidas G Ioannou, Konstantinos Mantzios, Lydia Tsoutsoubi, Sean R Notley, Petros C Dinas, Matt Brearley, Yoram Epstein, George Havenith, Michael N Sawka, Peter Bröde, Igor B Mekjavic, Glen P Kenny, Thomas E Bernard, Lars Nybo, Andreas D Flouris","doi":"10.1080/23328940.2022.2037376","DOIUrl":"10.1080/23328940.2022.2037376","url":null,"abstract":"In a series of three companion papers published in this Journal, we identify and validate the available thermal stress indicators (TSIs). In this first paper of the series, we conducted a systematic review (registration: INPLASY202090088) to identify all TSIs and provide reliable information regarding their use (funded by EU Horizon 2020; HEAT-SHIELD). Eight databases (PubMed, Agricultural and Environmental Science Collection, Web of Science, Scopus, Embase, Russian Science Citation Index, MEDLINE, and Google Scholar) were searched from database inception to 15 April 2020. No restrictions on language or study design were applied. Of the 879 publications identified, 232 records were considered for further analysis. This search identified 340 instruments and indicators developed between 200 BC and 2019 AD. Of these, 153 are nomograms, instruments, and/or require detailed non-meteorological information, while 187 can be mathematically calculated utilizing only meteorological data. Of these meteorology-based TSIs, 127 were developed for people who are physically active, and 61 of those are eligible for use in occupational settings. Information regarding the equation, operating range, interpretation categories, required input data, as well as a free software to calculate all 187 meteorology-based TSIs is provided. The information presented in this systematic review should be adopted by those interested in performing on-site monitoring and/or big data analytics for climate services to ensure appropriate use of the meteorology-based TSIs. Studies two and three in this series of companion papers present guidance on the application and validation of these TSIs, to guide end users of these indicators for more effective use.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"227-262"},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ce/dd/KTMP_9_2037376.PMC9542768.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33495833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heat acclimation does not negatively affect salivary immunoglobulin-A and self-reported illness symptoms and wellness in recreational athletes. 热驯化对休闲运动员的唾液免疫球蛋白a和自述疾病症状和健康没有负面影响。

Temperature Pub Date : 2022-07-25 eCollection Date: 2022-01-01 DOI: 10.1080/23328940.2022.2088029

Puck Alkemade, Nicola Gerrett, Hein A M Daanen, Thijs M H Eijsvogels, Thomas W J Janssen, Lauren C Keaney

{"title":"Heat acclimation does not negatively affect salivary immunoglobulin-A and self-reported illness symptoms and wellness in recreational athletes.","authors":"Puck Alkemade, Nicola Gerrett, Hein A M Daanen, Thijs M H Eijsvogels, Thomas W J Janssen, Lauren C Keaney","doi":"10.1080/23328940.2022.2088029","DOIUrl":"https://doi.org/10.1080/23328940.2022.2088029","url":null,"abstract":"Heat acclimation (HA) protocols repeatedly expose individuals to heat stress. As HA is typically performed close to the pinnacle event, it is essential that the protocol does not compromise immune status, health, or wellbeing. The purpose of this study was to examine the effect of HA on resting salivary immunoglobulin-A (s-IgA) and salivary cortisol (s-cortisol), self-reported upper-respiratory tract symptoms, and self-reported wellness parameters. Seventeen participants (peak oxygen uptake 53.2 ± 9.0 mL·kg-1·min-1) completed a 10-day controlled-hyperthermia HA protocol, and a heat stress test both before (HST1) and after (HST2) HA (33°C, 65% relative humidity). Resting saliva samples were collected at HST1, day 3 and 7 of the HA protocol, HST2, and at 5 ± 1 days post-HA. Upper-respiratory tract symptom data were collected weekly from one week prior to HA until three weeks post HA, and wellness ratings were reported daily throughout HA. HA successfully induced physiological adaptations, with a lower end-exercise rectal temperature and heart rate and higher whole-body sweat rate at HST2 compared to HST1. In contrast, resting saliva flow rate, s-IgA concentration, s-cortisol concentration, and s-cortisol secretion rate remained unchanged (n = 11-14, P = 0.10-0.48). Resting s-IgA secretion rate increased by 39% from HST1 to HST2 (n = 14, P = 0.03). No changes were observed in self-reported upper respiratory tract symptoms and wellness ratings. In conclusion, controlled-hyperthermia HA did not negatively affect resting s-IgA and s-cortisol, self-reported upper-respiratory tract symptoms, and self-reported wellness parameters in recreational athletes.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"331-343"},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ae/42/KTMP_9_2088029.PMC9629114.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40469507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small changes in thermal conditions hinder marathon running performance in the tropics. 热量条件的微小变化会影响热带地区的马拉松比赛成绩。

Temperature Pub Date : 2022-07-15 eCollection Date: 2022-01-01 DOI: 10.1080/23328940.2022.2086777

Glenn C W Tan, Kaiyuan Zheng, Wee K Cheong, Christopher Byrne, Jan N Iversen, Jason K W Lee

{"title":"Small changes in thermal conditions hinder marathon running performance in the tropics.","authors":"Glenn C W Tan, Kaiyuan Zheng, Wee K Cheong, Christopher Byrne, Jan N Iversen, Jason K W Lee","doi":"10.1080/23328940.2022.2086777","DOIUrl":"10.1080/23328940.2022.2086777","url":null,"abstract":"We examined marathon performance of the same group of runners in relation to small changes in dry bulb temperature (Tdb) and wet bulb temperature (Twb) across 3 consecutive y, and investigated whether performance was poorer during an evening marathon compared with morning marathons. Marathon results were obtained from the 2017, 2018, and 2019 Standard Chartered Singapore Marathons. Tdb, Twb, Td, relative humidity, and absolute humidity were gathered for each marathon. K-means clustering and linear regressions were performed on 610 runners who participated in all three marathons. Analysis of the 610 runners' marathon performance was contrasted with Tdb and Twb. Linear regressions were also performed on 190 runners filtered by percentile, yielding similar results. For clusters with similar Tdb from all runners K-means clustering, an increase in mean Twb by 1.5°C coincided with an increase in finishing time by 559 s (9.3 min) (p < 0.033). Twb hinders marathon performance more than Tdb, with each percentage rise in Tdb and Twb resulting in an increase in net time by 7.6% and 39.1%, respectively (p < 0.025). Male and female runners' response to Tdb and Twb changes were similar (overlap in 95% confidence intervals for the respective regression coefficients). In conclusion, small variations in environmental parameters affected marathon performance, with Twb impairing marathon performance more than Tdb. Marathon performance was likely better in the morning than evening, possibly due to time of day differences, along with unfavorable Tdb that superseded training effects and the effects of lower Twb.","PeriodicalId":36837,"journal":{"name":"Temperature","volume":" ","pages":"373-388"},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/8a/4f/KTMP_9_2086777.PMC9629073.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40469506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0