- 著者
- Karin LUNDGREN-KOWNACKI Mats DAHL Chuansi GAO Kristina JAKOBSSON Caroline LINNINGE Danping SONG Kalev KUKLANE
- 出版者
- 独立行政法人 労働安全衛生総合研究所
- 雑誌
- Industrial Health (ISSN:00198366)
- 巻号頁・発行日
- pp.2017-0030, (Released:2017-10-20)
- 被引用文献数
- 8
It is common practice in India to consume the dairy drink buttermilk as a way of mitigating occupational heat strain. This paper explores the thermoregulatory and hydration benefits of drinking buttermilk but also the impacts of work in a hot environment on the gut microbiota, renal and cognitive function. Twelve healthy participants were subjected to a 3-hour period of medium load physical intermittent work in a climatic chamber (34°C, 60 % RH). The subjects were given water, buttermilk (700 ml) or no rehydration at random. Mean body temperatures when no rehydration was given were significantly higher (P≤0.001). When subjects drank water or buttermilk they had a lower sweat rate than with no rehydration (P≤0.05) and the perception of feeling hot, uncomfortable, thirsty and physically exerted was significantly reduced (P≤0.05). A hormonal stress response at the end of the exposure was seen when not drinking (P≤0.05). No differences in cognitive abilities and gut microbiota were found. The exposure lowered the renal blood flow suggesting an acute impact of short term heat exposure. It was also found that buttermilk has a protective effect on this impact. Our results demonstrated that keeping hydrated by water/buttermilk consumption mitigates heat strain in well-nourished subjects.
- 著者
- Qiuqing Geng Kalev Kuklane Ingvar Holmér
- 出版者
- 日本生理人類学会
- 雑誌
- Applied Human Science (ISSN:13413473)
- 巻号頁・発行日
- vol.16, no.6, pp.229-236, 0001-01-01 (Released:2001-09-28)
- 参考文献数
- 8
- 被引用文献数
- 3 6 4
In this study, tactile sensitivity of gloved hand in the cold operation has been investigated. The relations among physical properties of protective gloves and hand tactile sensitivity and cold protection were also analysed both objectively and subjectively. Subjects with various gloves participated in the experimental study during cold exposure at different ambient temperatures of -12°C and -25°C. Tactual performance was measured using an identification task with various sizes of objects over the percentage of misjudgment. Forearm, hand and finger skin temperatures were also recorded throughout. The experimental data were analysed using analysis of variance (ANOVA) model and the Tukey's multiple range test. The results obtained indicated that the tactual performance was affected both by gloves and by hands/fingers cooling. Effect of object size on the tactile discrimination was significant and the misjudgment increased when similar sizes of objects were identified, especially at -25°C.