Effects of cold exposure discontinuation on finger cold-induced vasodilation of older retired Korean female divers ‘Haenyeos’

Ko, Yelin; Seol, Seon-Hong; Kim, Guk Hyeon; Yu, Hyeon Hui; Lee, Jooyoung

doi:10.1016/j.jtherbio.2020.102642

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…Conversely, no enhancement in the CIVD response during cold-water immersion might further explain our inability to observe improvements in rewarming of the fingers following both the HeA/HypA and NorEx protocols. Similarly, Ko et al ( 2020 ) observed that higher minimum finger temperature during cold-water immersion is associated with a faster recovery during the rewarming phase. Cold injury may not only be attributed to tissue cooling but also to the lack of recovery following the cold exposure.…”

Section: Discussionmentioning

confidence: 80%

“…When conducting CIVD measurements, interest is usually focussed on the finger skin temperature during cold-water immersion (Daanen et al 2012 ; Keramidas et al 2010 ; Mekjavic et al 2008 ). However, some studies also consider the recovery phase that is initiated with the rewarming of the hand once it is removed from the cold water (Kingma et al 2019 ; Ko et al 2020 ; Lee et al 2013 ; Keramidas et al 2019 ). The present study employed a 15-min recovery phase after cold-water immersion to observe potential alterations in rewarming of the hand as a result of the acclimation protocol.…”

Section: Discussionmentioning

confidence: 99%

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Heat acclimation enhances the cold-induced vasodilation response

et al. 2021

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Purpose It has been reported that the cold-induced vasodilation (CIVD) response can be trained using either regular local cold stimulation or exercise training. The present study investigated whether repeated exposure to environmental stressors, known to improve aerobic performance (heat and/or hypoxia), could also provide benefit to the CIVD response. Methods Forty male participants undertook three 10-day acclimation protocols including daily exercise training: heat acclimation (HeA; daily exercise training at an ambient temperature, Ta = 35 °C), combined heat and hypoxic acclimation (HeA/HypA; daily exercise training at Ta = 35 °C, while confined to a simulated altitude of ~ 4000 m) and exercise training in normoxic thermoneutral conditions (NorEx; no environmental stressors). To observe potential effects of the local acclimation on the CIVD response, participants additionally immersed their hand in warm water (35 °C) daily during the HeA/HypA and NorEx. Before and after the acclimation protocols, participants completed hand immersions in cold water (8 °C) for 30 min, followed by 15-min recovery phases. The temperature was measured in each finger. Results Following the HeA protocol, the average temperature of all five fingers was higher during immersion (from 13.9 ± 2.4 to 15.5 ± 2.5 °C; p = 0.04) and recovery (from 22.2 ± 4.0 to 25.9 ± 4.9 °C; p = 0.02). The HeA/HypA and NorEx protocols did not enhance the CIVD response. Conclusion Whole-body heat acclimation increased the finger vasodilatory response during cold-water immersion, and enhanced the rewarming rate of the hand, thus potentially contributing to improved local cold tolerance. Daily hand immersion in warm water for 10 days during HeA/Hyp and NorEx, did not contribute to any changes in the CIVD response.

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Heat acclimation enhances the cold-induced vasodilation response

et al. 2021

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“… 26 Therefore, the human body has a heat generation reaction to maintain a constant body temperature, and there is a shivering mechanism and non-shivering heat generation mechanism. 9 27 28 29 The function of these tissues decreases with age and recent studies showed that as aging progressed, thermogenesis decreased due to the decreased expression of UCP1 and ANS function decreased due to the loss of mitochondrial function in brown adipose tissue (BAT). 30 31 32 …”

Section: Discussionmentioning

confidence: 99%

“…Recent Haenyeo studies related to cold adaptation reported that body temperature and energy metabolism, heart rate changes, and local cold tolerance were related to cold-induced vasodilation in cold-exposed older Haenyeo. 8 9 However, to confirm the cold adaptation of Haenyeo, research on biomarkers to analyze the mechanisms involved in regulating heat generation reactions is needed. According to a recent study, orexin and irisin are 2 representative substances that are newly emerging as substances closely related to heat production in the body ( Fig.…”

Section: Introductionmentioning

confidence: 99%

The acclimatization of Haenyeo to a cold environment and occupational characteristics evaluated by orexin and irisin levels

Lee

Jang

et al. 2022

Ann Occup Environ Med

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Background Haenyeo is a woman who has the job of collecting seafood in the Jeju Sea at an average temperature of 13°C–14°C. The purpose of this study was to examine the cold acclimatization and occupational characteristics of Haenyeo through biomarkers such as orexin and irisin related to heat generation in the body. Methods Twenty-one Haenyeo and 25 people with similar age, body type, and body mass index were selected as the control group (Control G). In the cold exposure experiment, a climate chamber was set to 5°C and both feet were immersed in a 15°C water tank for 30 minutes. Tympanic temperature (T ty ) and skin temperature (T sk ) were measured, and the mean body temperature (mT b ) was calculated. Blood samples were collected before and immediately after the examination. Orexin and irisin levels were analyzed. Results Orexin levels were elevated after cold stimulation from 12.17 ± 4.44 to 12.95 ± 4.53 ng/mL (Haenyeo group [Haenyeo G], p < 0.01) and 10.37 ± 3.84 to 11.25 ± 4.02 ng/mL (Control G, p < 0.001). Irisin levels were elevated after cold stimulation from 4.83 ± 2.28 to 5.36 ± 2.23 ng/mL (Haenyeo G, p < 0.001) and 3.73 ± 1.59 to 4.18 ± 2.04 ng/mL (Control G, p < 0.001). The difference between Haenyeo G and Control G values in orexin and irisin appears not only in pre-exposure but also in post-exposure ( p < 0.05). Conclusions Our experimental results suggest that Haenyeo G were relatively superior in cold tolerance to Control G under cold exposure conditions. Haenyeo’s cold acclimatization is due to the basic differences in pyrogens regarding body temperature control such as orexin and irisin. This means that Haenyeo are advantageous for cold survival.

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Subjective perceptions of 8, 11 and 14°C chemotherapy liquid cooled gloves and socks

Roh,

Baek,

Lee

et al. 2023

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We investigated the effects of peripheral cooling using chemotherapy gloves and socks at three cooling temperatures on subjective perceptions. The hands and feet were cooled with 8, 11, and 14°C by water-perfused gloves or socks. Nine females participated in six experimental conditions: hands or feet cooling at 8, 11, and 14°C. The heat was extracted at 3.8, 5.4, and 7.7 kJ·min1 via the gloves and at 4.1, 6.0, and 9.0 kJ·min-1 via the socks. While the results showed that overall subjective perceptions did not differ among the three temperatures (~ 9.0 kJ·min-1), there were significant differences in local thermal comfort, pain sensation, and pain discomfort among the three cooling temperatures (P < 0.05). When cooling the hands or feet at 8, 11 or 14°C, subjects felt ‘cold’ or ‘cool’, on average, at the end of 60-min cooling with no significant differences among the three temperatures, whereas subjects felt more uncomfortable at 8°C than 14°C for cooling either the hands or feet (P < 0.05). Subjects felt more pain at 8°C than 14°C cooling for both hands and feet. These results indicate that the 8°C cooling for 60 min might cause uncomfortable pain sensation, especially for cold-vulnerable individuals. We recommend 1) a cooling bout of less than 60 min, 2) a cooling temperature higher than 8oC when cooling the hands or feet, and 3) a higher temperature for the feet when the hands are simultaneously cooled. However, the present results on subjective perceptions should be interpreted with peripheral vasoconstriction of fingers and toes while cooling.

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Effects of cold exposure discontinuation on finger cold-induced vasodilation of older retired Korean female divers ‘Haenyeos’

Cited by 4 publications

References 26 publications

Heat acclimation enhances the cold-induced vasodilation response

Heat acclimation enhances the cold-induced vasodilation response

The acclimatization of Haenyeo to a cold environment and occupational characteristics evaluated by orexin and irisin levels

Subjective perceptions of 8, 11 and 14°C chemotherapy liquid cooled gloves and socks

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