{"title":"Effects of protein drink temperature on leg muscle strength and muscle mass during a 4-week training period: A pilot study.","authors":"Kyoko Fujihira, Masaki Takahashi, Atsushi Tahara, Saeka Fuke, Naoyuki Hayashi","doi":"10.1080/23328940.2025.2588730","DOIUrl":"10.1080/23328940.2025.2588730","url":null,"abstract":"<p><p>Adequate post-exercise protein intake supports muscle recovery. Studies showed that hot drinks accelerate gastric emptying and enhance nutrient absorption. However, the effect of drink temperature on muscle strength and mass remains unclear. Therefore, this study conducted a 4-week intervention study and an acute study focusing on digestion rate. In Study 1, a 4-week parallel-group trial was conducted in 38 healthy adults without exercise habits, assigned to either a Cold ( < 10°C) or Hot (60°C) group. Participants consumed a 250 mL of protein drink daily at the designated temperature and performed 30 minutes of leg strength training three times per week. Knee extensor strength and leg muscle mass were assessed before and after the intervention. In Study 2, the effect of 200 mL of a protein drink temperature (4 or 60°C) on gastric emptying rate was investigated using <sup>13</sup>C stable isotope breath test. In Study 1, an analysis of covariance, with pre-intervention values as covariates, revealed a significant group effect on post-intervention knee extensor strength in the right leg, with the Hot group showing 12% higher strength (35.7 ± 1.3 kgf, mean±standard error) compared to the Cold group (31.4 ± 1.2 kgf) (<i>p</i> = 0.017). There was no significant difference in muscle mass between the groups. In Study 2, the initial <sup>13</sup>CO<sub>2</sub> excretion rate was higher in the Hot group (<i>p</i> < 0.001). The findings of this study suggest that the temperature of protein drinks may modestly influence early-phase digestion and may have a limited impact on muscle strength in individuals without regular exercise habits.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"13 1","pages":"59-70"},"PeriodicalIF":0.0,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12962669/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147378942","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}
TemperaturePub Date : 2025-11-21eCollection Date: 2026-01-01DOI: 10.1080/23328940.2025.2588731
Spencer S H Roberts, Charles S Urwin, James Regan, Steven J Bowe, Stuart A Warmington
{"title":"Game-day temperatures are predictive of National Football League game outcomes when teams from different climates compete against each other.","authors":"Spencer S H Roberts, Charles S Urwin, James Regan, Steven J Bowe, Stuart A Warmington","doi":"10.1080/23328940.2025.2588731","DOIUrl":"10.1080/23328940.2025.2588731","url":null,"abstract":"<p><p>NFL teams may have an advantage over their opposition when players are more familiar with game-day temperatures; however, relationships between game-day air temperature and team performance had not been examined using official at-stadia air temperatures. Game data from 2017 to 25 were collected from NFL \"Gamebooks.\" Data were extracted for games contested by a team based in a cool climate >39° N (North teams, <i>n</i> = 17) against a team based in a warm climate <39° N (South teams, <i>n</i> = 15). Data extracted included game-day temperature (°C), game location (North, South), game outcome (win, no-win [relative to North team]), and point differential (points [relative to North team]). Mixed effects logistic regressions examined whether game-day temperature associated with game outcome, while mixed effects models examined whether temperature associated with point differential. Models were run for all games combined, and for games contested in North and South locations, respectively. North team win probability declined as game-day temperature increased (OR = 0.974, 95% CI [0.951, 0.997], <i>p</i> = .026), and North team point differential was negatively associated with temperature (β = -0.175, 95% CI [-0.286, -0.063], <i>p</i> = .002). Models run according to game location revealed that North team point differential was associated with game-day temperature for games played South (β = -0.152, 95% CI [-0.242, -0.063], <i>p</i> = .001). In NFL games contested by North (>39° N) versus South (<39° N) teams, North teams are less likely to win and have worse point differentials, as game-day temperatures increase. Research should explore whether behavioral or psychological adaptations to familiar game-day temperatures explain these findings.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"13 1","pages":"51-58"},"PeriodicalIF":0.0,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12962687/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147378961","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}
TemperaturePub Date : 2025-11-06eCollection Date: 2026-01-01DOI: 10.1080/23328940.2025.2580859
Frank E Marino, Michael Chang
{"title":"Physiological and perceptual changes underly the decline in cognitive-motor performance during acute and repeated cold stress.","authors":"Frank E Marino, Michael Chang","doi":"10.1080/23328940.2025.2580859","DOIUrl":"https://doi.org/10.1080/23328940.2025.2580859","url":null,"abstract":"<p><p>This study examined the impact of cold-induced stress on cognitive and motor performance. Thirteen males (19.7 ± 0.23 yr) trained on a computer-based visuomotor task once daily for six consecutive days. The task (19 min per trial; joystick-controlled falling blocks) included brief rest/training intervals. After the first three trials, participants were allocated to control (CON, <i>n</i> = 5) or cold stress (CS, <i>n</i> = 8). On days 4-6, CS completed a 60-min head-out cold-water immersion immediately before the task, producing a ~ 0.5°C drop in core temperature, whereas CON remained stable. Heart rate, ventilation, respiratory frequency (<i>R</i> <sub>f</sub>), inspiratory drive (<i>I</i> <sub>d</sub>), oxygen consumption, epinephrine, norepinephrine (NEP), cortisol, and subjective measures (thermal comfort, TC; temporal judgment, TJ) were recorded pre-, during, and end-of-trial. CON improved performance by 84%, whereas CS performance was attenuated;(<i>p</i> < 0.01). CON showed no significant physiological or subjective changes. In CS, performance correlated inversely with <i>R</i> <sub>f</sub> (<i>r</i> = -0.56, <i>p</i> = 0.004), and regression indicated <i>I</i> <sub>d</sub>, NEP, Rf, TC, and TJ predicted performance;(<i>p</i> < 0.0001; R<sup>2</sup> = 0.87). Thus, repeated pre-task cold exposure impaired performance, consistent with a complex interaction between physiological and subjective responses.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"13 1","pages":"88-101"},"PeriodicalIF":0.0,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12959175/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147366485","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}
TemperaturePub Date : 2025-11-05eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2583810
Ayla M Gabel, Sydney N Cosentino, Joseph P Bachraty, Pranav S Chauhan, Kayla E Leo, Hayden W Hess
{"title":"An assessment of the occupational heat stress recommendations in adults with obesity.","authors":"Ayla M Gabel, Sydney N Cosentino, Joseph P Bachraty, Pranav S Chauhan, Kayla E Leo, Hayden W Hess","doi":"10.1080/23328940.2025.2583810","DOIUrl":"https://doi.org/10.1080/23328940.2025.2583810","url":null,"abstract":"<p><p>Occupational heat stress and hydration recommendations aim to prevent core temperatures from exceeding 38.0°C and dehydration in unacclimated workers. These guidelines do not consider individual differences in body composition. We hypothesized that core temperatures would be higher in adults with obesity during simulated occupational heat stress compared to adults without obesity when adhering to the current heat stress recommendations. Twenty-two unacclimated adults with [<i>n</i> = 10; 6 women; body fat % (37 ± 5%)] or without [<i>n</i> = 12; 7 women; body fat % (22 ± 6%)] obesity completed a 4-hour (half workday) exposure to a fixed wet-bulb globe temperature (WBGT) and work intensity. Work-rest ratio was 30 minutes of walking and 30 minutes of seated rest each hour. Work intensity [i.e. metabolic heat production (H<sub>prod</sub>)] was prescribed as a function of WBGT (27.6 ± 0.5°C) and normalized to body mass (5.0 ± 0.4 W•kg<sup>-1</sup>). All subjects were provided 237 mL of Gatorade every 15 min and drank <i>ad libitum</i>. Peak core temperature was higher in the obese (38.4 ± 0.3°C) compared to the non-obese (37.7 ± 0.4°C; <i>p</i> < 0.01) group. Mean core temperature was higher in the obese (37.9 ± 0.2°C) compared to the non-obese (37.4 ± 0.3°C; <i>p</i> < 0.01) group. <i>Ad libitum</i> drinking was not different between the obese (1.8 ± 0.8 L) and non-obese (1.8 ± 0.7 L; <i>p</i> = 0.94) groups. Percent change in body mass did not differ between the obese (-0.6 ± 0.6%) and non-obese (-0.4 ± 0.9%; <i>p</i> = 0.63) groups. Adherence to the heat stress recommendations during a 4-hour exposure resulted in elevated core temperature responses in adults with obesity compared to adults without obesity.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"387-400"},"PeriodicalIF":0.0,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818798/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020057","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}
TemperaturePub Date : 2025-11-04eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2574115
Nick Kruijt, Sanne A J H van de Camp, Maria T E Hopman, Luuk R van den Bersselaar, Heinz Jungbluth, Thijs M H Eijsvogels, Nicol C Voermans, Coen C W G Bongers
{"title":"Thermoregulation during exercise under controlled hot ambient conditions is comparable in individuals with a history of exertional heat stroke, <i>RYR1</i>-related malignant hyperthermia, and healthy controls.","authors":"Nick Kruijt, Sanne A J H van de Camp, Maria T E Hopman, Luuk R van den Bersselaar, Heinz Jungbluth, Thijs M H Eijsvogels, Nicol C Voermans, Coen C W G Bongers","doi":"10.1080/23328940.2025.2574115","DOIUrl":"https://doi.org/10.1080/23328940.2025.2574115","url":null,"abstract":"<p><p>Exertional heat stroke (EHS) and Malignant Hyperthermia (MH) are potentially life-threatening conditions with overlapping clinical characteristics. In this study, we compared the thermoregulatory response to exercise under increased environmental temperatures in individuals with a history of EHS (<i>n</i> = 15) or MH (<i>n</i> = 14) to healthy controls (<i>n</i> = 15). Groups were age- and sex-matched (31 male, 13 female, 42 ± 10 years). A 60-min exercise test was performed on a cycle ergometer at an ambient temperature of 30.3 ± 0.6°C and a relative humidity of 33.5 ± 4.7%. A stepwise incremental exercise protocol was used to reach a metabolic heat production of 6, 8 and 9 W/kg body mass. Gastrointestinal (T<sub>gi</sub>) and skin (T<sub>sk</sub>) temperature were monitored continuously, and partitional calorimetry was used to calculate dry (H<sub>dry</sub>) and respiratory heat loss (H<sub>resp</sub>). Whole-body sweat rate (WBSR) was assessed by measuring body mass. Exercise-induced increases in T<sub>gi</sub> (1.4 ± 0.5°C) and T<sub>sk</sub> (1.9 ± 0.8°C) were observed, but the magnitude of increase across groups was comparable (p<sub>time*group</sub> = 0.80 and <i>p</i> = 0.57, respectively). H<sub>dry</sub> was significantly lower in EHS participants (54 ± 4 W) compared to controls (65 ± 11 W, <i>p</i> = 0.023). No differences were observed in H<sub>resp</sub> and WBSR. Our results suggest that individuals with MH or a history of EHS do not have an altered thermoregulatory response to exercise in the heat in a controlled setting. Further research is required to determine to what extent the complex accumulation of risk factors contributes to EHS susceptibility.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"373-386"},"PeriodicalIF":0.0,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818818/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020198","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}
TemperaturePub Date : 2025-10-28eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2578080
Grant J Landers, Olivier Girard, Zehra Palejwala, Fiona M Wood, Karen E Wallman, Stephanie Hollins
{"title":"Effect of cold and warm water ingestion on physiological and performance parameters during simulated hot burn surgeries.","authors":"Grant J Landers, Olivier Girard, Zehra Palejwala, Fiona M Wood, Karen E Wallman, Stephanie Hollins","doi":"10.1080/23328940.2025.2578080","DOIUrl":"10.1080/23328940.2025.2578080","url":null,"abstract":"<p><p>This study assessed the effects of hydration and hydration/cooling on various psycho-physiological and cognitive responses in staff during a simulated burns surgery. Twelve participants completed three 2.5-h trials in the heat (33.6°C, 36.4% RH) whilst walking on a treadmill at a rating of perceived exertion of 12 on the Borg scale. Trials consisted of: i) ingestion of 37°C water (HYD); ii) ingestion of 5°C water (COLD); and iii) a no cooling/hydration control (CON). Water ingestion (0.9% of body-mass) was based on fluid loss calculated during a previous 2.5-h burn surgery. Results demonstrated that while treadmill distance was similar between trials (<i>p</i> > 0.05), cold water ingestion resulted in improved manual dexterity (<i>p</i> = 0.03), better thermal comfort (<i>p</i> < 0.01) and lower core and skin temperatures (<i>p</i> < 0.01), compared to CON. Skin temperature was also lower in COLD vs HYD (<i>p</i> < 0.01). Moderate to large effect sizes (ES, <i>g</i> = 0.38-0.77) were observed in favor of COLD versus CON and/or HYD for manual dexterity, counting span, grammatical reasoning and several perceived workload subsets at various time points, however associated 95% confidence intervals were wide and crossed zero, suggesting statistical uncertainty. Similarly, moderate to large ES (<i>g</i> = 0.45-0.77) favored HYD over CON for counting span (120 min) and various perceived workload outcomes, though again confidence intervals suggest that these effects were not statistically conclusive. No differences were observed between trials for sweat loss, thermal sensation, or heart-rate (<i>p</i> > 0.05). Overall, cold water ingestion resulted in benefit to numerous variables assessed here. Small boluses of cold water ingestion are recommended during hot burn surgeries.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"401-416"},"PeriodicalIF":0.0,"publicationDate":"2025-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818804/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020102","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}
TemperaturePub Date : 2025-10-23eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2572271
Xiujing Zhao, Brendon P McDermott, Jennifer K Vanos
{"title":"Heat index and humidex, but not other measures, identify heat stress compensability during moderate cycling.","authors":"Xiujing Zhao, Brendon P McDermott, Jennifer K Vanos","doi":"10.1080/23328940.2025.2572271","DOIUrl":"https://doi.org/10.1080/23328940.2025.2572271","url":null,"abstract":"<p><p>To examine the suitability of common heat stress indicators, including wet-bulb globe temperature (WBGT), universal thermal climate index (UTCI), heat index (HI), and humidex, to (1) determine uncompensable heat stress and (2) the capability of the indicators to directionally match physiological and perceptual strain in varying thermal environments. Ten healthy, active males (2+/-7 y, 179+/-11 cm, 77.4+/-9.3 kg, 51.9+/-5.3 mL/kg/min) performed two randomized, crossover exercise trials (60-min cycling ~55% ṼO<sub>2peak</sub>) in hot-dry (HD, 39.1°C, 33% RH) and warm-humid (WH, 34.5°C, 59% RH) conditions. Metabolic heat production (H<sub>prod</sub>), evaporation required for heat balance (E<sub>req</sub>), and maximum evaporative rate (E<sub>max</sub>) were calculated. Estimated compensability was determined using E<sub>req</sub> to E<sub>max</sub> ratio. Physiological and perceptual measures occurredthroughout. There were no differences in WBGT (<i>p</i> = .83, d = .59), HI (<i>p</i> = .65, d = 1.9), and humidex (<i>p</i> = .73, d = 1.10) between HD and WH. UTCI in HD was significantly greater than in WH (p <math><mo><</mo></math> .001, d = 1.19). There were no differences inphysiological measures (p > .34) between HD and WH, indicating different environments with matched WBGT, HI, and humidex matched thermal, cardiovascular, and perceptual strain, but not UTCI. H<sub>prod</sub> (p <math><mo>=</mo></math> 0.04, <math><mi>η</mi></math> <sub>p</sub> <sup>2</sup> = .38), E<sub>req</sub> (p <math><mo><</mo></math> 0.001, <math><mi>η</mi></math> <sub>p</sub> <sup>2</sup> = .75), and E<sub>max</sub> (p <math><mo><</mo></math> 0.001, <math><mi>η</mi></math> <sub>p</sub> <sup>2</sup> = .94) in HD were significantly greater than WH. E<sub>req</sub>/E<sub>max</sub> in both HD and WH indicated uncompensable heat stress. HI and humidex identified compensability, physiological, and perceptual strain adequately under HD and WH conditions.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"337-350"},"PeriodicalIF":0.0,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818811/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020179","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}
TemperaturePub Date : 2025-10-17eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2575427
Duncan Mitchell, Michael N Sawka, Suzanne Schneider
{"title":"Tribute to a great and unique thermal physiologist - Leo Charles Senay.","authors":"Duncan Mitchell, Michael N Sawka, Suzanne Schneider","doi":"10.1080/23328940.2025.2575427","DOIUrl":"https://doi.org/10.1080/23328940.2025.2575427","url":null,"abstract":"","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"314-317"},"PeriodicalIF":0.0,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818815/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020113","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}
TemperaturePub Date : 2025-09-06eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2548137
{"title":"About the Cover.","authors":"","doi":"10.1080/23328940.2025.2548137","DOIUrl":"https://doi.org/10.1080/23328940.2025.2548137","url":null,"abstract":"","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 3","pages":"201"},"PeriodicalIF":0.0,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12416194/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030833","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}
TemperaturePub Date : 2025-07-29eCollection Date: 2025-01-01DOI: 10.1080/23328940.2025.2535046
Shelly Ruart, Olivier Hue, Nicolas Robin
{"title":"Cognitive and athletic performances in tropical climate: The effect of time of day.","authors":"Shelly Ruart, Olivier Hue, Nicolas Robin","doi":"10.1080/23328940.2025.2535046","DOIUrl":"10.1080/23328940.2025.2535046","url":null,"abstract":"<p><p>We determined whether the time of day when students exercise in a tropical climate and the environmental conditions in which they attend theory classes (air conditioning vs. tropical climate) have an impact on athletic performance and physiological, psychological and perceptual parameters. Twenty-nine students took part in four experimental sessions consisting of outdoor exercises and theory classes from 7am-1pm, according to a randomized and counterbalanced order. Cognitive and exercise performances, perceptual responses, core temperature and heart rate were assessed in the air-conditioned and tropical climate conditions. Cognitive performance was lower in the tropical vs air-conditioned environment, including lower concentration, higher inattention and lower processing speed during the theory classes. During theory classes in a tropical climate, heart rate and core temperature were higher. Average concentration scores (i.e. mean: 107.0 vs. 234.0), and inattention (i.e. mean: 96.0 vs. 32.5) at end-morning (i.e. 11am-1pm) were negatively affected by tropical climate compared to air conditioning when it was preceded by physical exercise at 9am-11am, but not at 7am-9am. There was a momentary sensation of fatigue, with higher scores at 11am-1 pm than at 7am-9am, in both conditions. Core temperatures were higher during exercise performance at 9am-11 am (38.6°C ±4.9°C) than at 7am-9 am (38.3°C ±5.2°C), but there was no difference for exercise performance, heart rate. Climate conditions must be taken into account for (i) cognitive performance and physiological parameters in tropical climate, and (ii) the time of day for exercise when theory classes take place in late morning and young student-athletes must perform cognitively well.</p>","PeriodicalId":36837,"journal":{"name":"Temperature","volume":"12 4","pages":"321-336"},"PeriodicalIF":0.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12818821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020049","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}