A fan-attached jacket worn in an environment exceeding body temperature suppresses an increase in core temperature

Hashimoto, Kahori; Horie, Seichi; Nagano, Chikage; Hibino, Hiroyuki; Mori, Kimiyo; Fukuzawa, Kimie; Nakayama, Masashi; Tanaka, Hiroyuki; Inoue, Jiro

doi:10.1038/s41598-021-00655-2

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…9 Hashimoto et al compared the cooling effect of ambient air-ventilated vest and water-cooled jacket supplied with chilled water at 10°C worn by nine subjects during moderate exercise in a hot and dry environment (40°C, 50% RH) and found both devices effectively reduced the elevation of core temperature. 10 Ciuha U compared the efficacy of air-cooled vest and water-cooled vest using thermal manikin in a hot environment (35°C, 35% RH), and found the water-cooled vest had higher cooling power than the aircooled vest at least until the coolant ice melted. 11 Barwood et al found that whole-body fanning was the most effective and a liquid-cooled garment was the least effective compared with hand immersion, an air-cooled garment, and a phase change garment in post-exercise cooling in a 31°C environment.…”

Section: Introductionmentioning

confidence: 99%

“…Troy et al evaluated the cooling effects of ambient air‐ventilated vest during moderate exercise in a hot and dry environment (40°C, 20% RH) and found the system reduced physiological strain 9 . Hashimoto et al compared the cooling effect of ambient air‐ventilated vest and water‐cooled jacket supplied with chilled water at 10°C worn by nine subjects during moderate exercise in a hot and dry environment (40°C, 50% RH) and found both devices effectively reduced the elevation of core temperature 10 . Ciuha U compared the efficacy of air‐cooled vest and water‐cooled vest using thermal manikin in a hot environment (35°C, 35% RH), and found the water‐cooled vest had higher cooling power than the air‐cooled vest at least until the coolant ice melted 11 .…”

Section: Introductionmentioning

confidence: 99%

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Partial cooling of the upper body with a water-cooled vest in an environment exceeding body temperature

Inoue

Nagano

Tabuchi

et al. 2023

Journal of Occupational Health

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ObjectivesTo evaluate the efficacy of water‐cooled clothing that continuously cools restricted body areas to suppress body temperature increase as an anti‐heatstroke measure for workers in hot environments that exceed body temperature.MethodsTen healthy men were placed in Room A (air temperature: 25°C, relative humidity: 50%) for 15 min. They were then transferred to Room B (air temperature: 40°C, relative humidity: 50%), where they rested for 10 min, then put on cooling clothing, and again rested for 15 min (the control group rested for 25 min). They then performed intense ergometer exercise for 40 min at 40% maximal oxygen consumption after which they rested for 10 min. The three trial conditions were CON (long‐sleeved summer work clothes), VEST (cooling vest), and P‐VEST (partial cooling vest). In VEST and P‐VEST, water‐cooled clothing continuously recirculated with 10°C water was used to cool the upper body. In P‐VEST, only the neck, axillae, and heart areas were in contact with the cooled clothing. The measured indices were the rectal, esophageal, and external auditory canal temperatures; heart rate; estimated sweat volume; and subjective evaluations.ResultsCompared with the CON condition, the rectal, esophageal, and external auditory canal temperatures and the heart rate were significantly lower and the subjective indices were decreased in the VEST and P‐VEST conditions.ConclusionsPartial cooling showed a body cooling effect similar to that of whole upper body cooling. Partial body cooling promoted the heat dissipation, suggesting that partial cooling is efficient for maintaining body cooling in hot environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Partial cooling of the upper body with a water-cooled vest in an environment exceeding body temperature

Inoue

Nagano

Tabuchi

et al. 2023

Journal of Occupational Health

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“…When recreational athletes have limited to access to ample amounts of water and ice, or there is a lack of electricity to maintain water temperature, cooling may be considered using a different method. Recently, a fan-cooling jacket was recently developed to mitigate the thermal strain and the risk of heat stroke during activity in hot outdoor environments ( 13 , 14 ). This jacket can be cooled via the process of circulating airflow underneath clothing by two small fans attached to the back of the waist and can be easily applied to recreational athletes.…”

Section: Introductionmentioning

confidence: 99%

Recovery with a fan-cooling jacket after exposure to high solar radiation during exercise in hot outdoor environments

Naito

Saito²,

Ohhashi³

et al. 2023

Front. Sports Act. Living

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The study aimed to investigate the effect of body cooling with a fan-cooling jacket on body temperature responses during recovery after exercise when exposed to high solar radiation in a hot outdoor environment. Nine males cycled using ergometer until their rectal temperature increased to 38.50 °C in hot outdoor environments, followed by body cooling recovery in warm indoor environments. Subjects repeatedly performed the cycling exercise protocol, which consisted of one set of 5 min at a load of 1.5 watt/kg body weight and 15 min at a load of 2.0 watt/kg body weight at 60 rpm. Body cooling recovery consisted of cold water ingestion (10°C: CON) or cold water ingestion + wearing a fan-cooling jacket (FAN) until the rectal temperature decreased to 37.75°C. The time for the rectal temperature to reach 38.5°C did not differ between the two trials. The rate of decrease in rectal temperature at recovery tended to be higher in FAN trial than in CON trial (P = 0.082). The rate of decrease in tympanic temperature was higher in FAN trials than in CON trials (P = 0.002). The rate of decrease in mean skin temperature at the first 20 min of recovery was higher in FAN than in CON trial (P = 0.013). Body cooling recovery with a fan-cooling jacket in addition to cold water ingestion may be effective in reducing elevated tympanic and skin temperatures after exercise in the heat under a clear sky, but may be difficult to decrease rectal temperature.

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“…In the industrial working environment, garments equipped with cooling materials, such as ice, phase change materials, and cooled water-perfusion systems, have been developed [ 7 – 9 ]. Also, a long-sleeve jacket that is similar to work clothing but has small fans attached to the back of the waist has sometimes been used among workers [ 10 – 12 ]. Internal cooling involves the introduction of a cold medium to the body through the mouth (and/or nose, in the case of breathing), and includes the consumption of cold fluids or ice and inhalation of cold air [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Application of tight-fitting half-facepiece breath-response powered air-purifying respirator for internal body cooling in occupational environment

et al. 2022

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In dust-generating scenarios in occupational environments, it is important to take measures to prevent not only pneumoconiosis, but also heatstroke. The aim of this study was to verify whether using a tight-fitting half-facepiece breath-response powered air-purifying respirator (PAPR) in combination with a self-produced cooling device could abate the deep body temperature while performing activities. We conducted a crossover study involving 10 subjects. The subjects were subjected to three conditions: wearing a PAPR equipped with a cooling device, PAPR, or a replaceable particulate respirator. During the experiment, the rectal temperature of the subjects was measured, along with the temperature near the PAPR inlet in container with the cooling device when the PAPR equipped with the cooling device was worn. The subjects rested in a cold chamber set at a dry-bulb temperature of 28°C and relative humidity of 45% for 20 min. Then, they moved to a hot chamber set to a dry-bulb temperature of 36°C (with the same relative humidity) in 5 min and exercised on a cycle ergometer for 30 min. After that, the subjects moved to the cold chamber for 5 min and rested for 20 min. Notably, the air inhaled by the subjects wearing PAPR equipped with the cooling device was approximately 10°C cooler than the ambient air. Furthermore, 35 min after the initiation of the experiment (after the middle of the exercise period), the rectal temperature of the participants wearing the PAPR equipped with the cooling device was lower than of those wearing PAPR or replaceable particulate respirators (p <0.05). Thus, we could deduce that the self-produced cooling device was useful in abating deep body temperature. PAPR is useful for its potential applications in hot occupational environments and can save lives in working environments where heat stress can result in major medical complications.

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A fan-attached jacket worn in an environment exceeding body temperature suppresses an increase in core temperature

Cited by 13 publications

References 24 publications

Partial cooling of the upper body with a water-cooled vest in an environment exceeding body temperature

Partial cooling of the upper body with a water-cooled vest in an environment exceeding body temperature

Recovery with a fan-cooling jacket after exposure to high solar radiation during exercise in hot outdoor environments

Application of tight-fitting half-facepiece breath-response powered air-purifying respirator for internal body cooling in occupational environment

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