Decreased thermal sweating of central sudomotor mechanism in <scp>A</scp>frican and <scp>K</scp>orean men

Lee, Jeong Beom; Kim, Jeong-Ho

doi:10.1002/ajhb.23091

Cited by 11 publications

(19 citation statements)

References 32 publications

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“…Likewise, sweat rate in females was lower than in male [1 ] . Tropical natives derived from the longterm heat acclimation were observed lower body sweat loss and sweat rate compared to temperate natives [9][10] . However, people under short-term heat acclimation could enhance sweating [13] .…”

Section: Introductionmentioning

confidence: 86%

Upper Body of Dynamic Sweat Distributions in Young Males Wearing Fully Encapsulating Chemical Protective Ensembles

Chen

Zhang²,

Lu³

et al. 2021

Preprint

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Fully encapsulating chemical protective ensembles (FCPE) has characteristic of impermeability, which may affect people’s sweat, accordingly influences clothing thermal-wet comfort. This study investigated upper-body dynamic sweat distribution in young males wearing FCPE, and evaluating changes in sweat rates both intra-region and inter-time. Participants were 10 healthy young male college students, aged 23.1\(\pm\)0.8 years. In a climatic chamber (environment temperature 35 ℃, relative humidity 60%), participants exercised on a treadmill at 4 km/h, 5%. A set of absorbent pads with 35 pads was used to collect sweat. Participants change a new set of absorbent pads every 5 minutes until trial stopped. Seven sets of pads were obtained. Average sweat rate of every 5 minutes is 389, 631, 920, 1137, 1100, 1211 and 1105 g.m−2.h−1, respectively. The top five high sweat rates were observed at the medial upper back, lateral lower back, medial upper chest, medial mid back and lateral top back, with average values 1406,1278,1198,1181 and 1139 g·m−2·h−1, respectively. The lower sweat rates were observed at waist (with average values 557, 370, 596 and 332 g·m−2·h−1, respectively) and bottom zones (with average values 373, 398, 661 and 849 g·m−2·h−1, respectively). Wearing FCPE greatly promoted body profuse sweating. Based on the distribution result, upper body can be divided into three levels of sweat rate zones, which could be used to improve clothing comfort. The present study provides basic physiological data and guidance for personal protective clothing design.

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Section: Introductionmentioning

confidence: 86%

Upper Body of Dynamic Sweat Distributions in Young Males Wearing Fully Encapsulating Chemical Protective Ensembles

Chen

Zhang²,

Lu³

et al. 2021

Preprint

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“…The subject sat in a chair in a relaxed posture for 60 min before the start of the main process. The heat load experiment was carried out by immersing half the body (up to waist) into a bath filled with hot water of 42 ± 0.5°C, which was a setting of similar thermal intensity often used in previous studies ( Lee et al, 2013 ; Shin et al, 2013 ; Lee and Shin, 2017 ; Lee and Kim, 2018 ). Since not all our subjects have experienced the heat loading before, half-body immersion in hot water could cause some discomfort.…”

Section: Methodsmentioning

confidence: 99%

“…Tympanic temperature (T ty ) was assessed continuously at 10-s intervals for 60 min in the left ear by inserting a thermistor probe (TSK7+1, Songkitopia, Inchen, South Korea) with a small spring (K923, Takara, Yokohama, Japan) connected to a personal computer (CF-T1, Panasonic, Tokyo, Japan) and a data logger (K-720, Technol Seven, Yokohama, Japan) ( Lee et al, 2013 ; Shin et al, 2013 ; Lee and Shin, 2017 ; Lee and Kim, 2018 ). When the thermistor probe contacted the tympanic membrane, the subject felt slight discomfort and could hear a scratching noise.…”

Section: Methodsmentioning

confidence: 99%

“…When the thermistor probe contacted the tympanic membrane, the subject felt slight discomfort and could hear a scratching noise. The inner pinna was filled with small cotton balls to fix the probe in the ear ( Lee et al, 2013 ; Shin et al, 2013 ; Lee and Shin, 2017 ; Lee and Kim, 2018 ).…”

Section: Methodsmentioning

confidence: 99%

“…Skin temperatures of the chest (Ts chest ), upper arm (Ts arm ), thigh (Ts thigh ), and leg (Ts leg ) were measured (continuous assessment, Schematic 1 ) with a TSK7+1 thermistor probe (Songkitopia, Incheon, South Korea) and a K923 small spring (Takara, Yokohama, Japan) ( Lee et al, 2013 ; Shin et al, 2013 ; Lee and Shin, 2017 ; Lee and Kim, 2018 ). The probe was connected to a CF-T1 personal computer (Panasonic, Tokyo, Japan) and a K-720 data logger (Technol Seven, Yokohama, Japan).…”

Section: Methodsmentioning

confidence: 99%

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Effect of Heat Stimulation on Circulating Irisin in Humans

Park

Lee

2021

Front. Physiol.

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High temperatures lead to oxidative stress. The aim of the study was to determine whether heat stimulation-induced hyperthermia can increase the level of circulating irisin. Twenty-one healthy female subjects (age, 26.3 ± 2.71 years; height, 162.1 ± 3.15 cm; weight, 54.2 ± 3.86 kg; and body surface area, 1.57 ± 0.11 m2) not taking contraceptives participated in this study. All experiments were performed individually for each participant when they were in the early proliferative menstrual phase. In an automated climate chamber (25 ± 0.5°C), the heat load was applied via half-body immersion into a hot water bath (42 ± 0.5°C). Five-minutes break was provided every after 5 min of immersion and the total passive heating time was 30 min. Tympanic temperature (Tty) and skin temperature (Ts) were measured. Mean body temperature (mTb) was calculated. Blood samples were collected before and immediately after immersion. Levels of irisin, cortisol, creatine kinase (CK), and lactate dehydrogenase (LDH) were analyzed. Tty, mTb and serum irisin levels increased after hot water immersion. The blood levels of cortisol, CK, and LDH were also elevated after hot water immersion. Heat stimulation might increase the levels of circulating irisin in humans in response to oxidative stress.

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Sweating distribution and active sweat glands on the scalp of young males in hot-dry and hot-humid environments

et al. 2018

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Decreased thermal sweating of central sudomotor mechanism in African and Korean men

Abstract: In conclusion, we observed a larger reduction of sudomotor activity in tropical Africans than in temperate Koreans, which was associated with their lower mean body temperature and lower resting BMR.

Cited by 11 publications

References 32 publications

Upper Body of Dynamic Sweat Distributions in Young Males Wearing Fully Encapsulating Chemical Protective Ensembles

Upper Body of Dynamic Sweat Distributions in Young Males Wearing Fully Encapsulating Chemical Protective Ensembles

Effect of Heat Stimulation on Circulating Irisin in Humans

Sweating distribution and active sweat glands on the scalp of young males in hot-dry and hot-humid environments

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