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Five weeks of intermittent hand exposures to alternating cold and hot stimuli do not modify finger cold-induced vasodilatation response
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Swedish Aerospace Physiology Centre, SAPC. Division of Environmental Physiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.ORCID iD: 0000-0002-4590-1326
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Swedish Aerospace Physiology Centre, SAPC. Division of Environmental Physiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.ORCID iD: 0000-0003-3470-5175
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Swedish Aerospace Physiology Centre, SAPC. Division of Environmental Physiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.ORCID iD: 0000-0001-9738-9320
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Swedish Aerospace Physiology Centre, SAPC. Division of Environmental Physiology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden; Division of Environmental Physiology, Swedish Aerospace Physiology Center, KTH Royal Institute of Technology, Stockholm, Sweden.ORCID iD: 0000-0002-7440-2171
2024 (English)In: Journal of Thermal Biology, ISSN 0306-4565, E-ISSN 1879-0992, Vol. 125, article id 104004Article in journal (Refereed) Published
Abstract [en]

We tested the hypothesis that prolonged intermittent hand exposures to transient contrast thermal stimuli would enhance the finger cold-induced vasodilatation (CIVD) response during localized cooling. Eight healthy men participated in a 5-week regimen, during which they immersed, thrice per week, the non-dominant (EXP) hand in 8° and 43 °C water, sequentially and at 3-min intervals, for a total period of 60 min. The contralateral (i.e., dominant) hand served as the control (CON) hand. Before and after the regimen, subjects conducted two 30-min hand cold (8 °C water) provocation trials, one with the EXP hand and the other with the CON hand. In addition, a flow-mediated dilatation test was performed in the brachial artery of the EXP arm. Regardless of the hand tested, the average finger skin temperature [CON hand: pre-trial = 10.5 (1.2)°C, post-trial = 10.8 (1.3)°C and EXP hand: pre-trial = 10.7 (1.1)°C, post-trial 10.9 (1.1)°C; p = 0.79], and the incidence of CIVD events [CON hand: pre-trial = 1.1 (1.2) events, post-trial = 1.2 (1.1) events and EXP hand: pre-trial = 1.1 (0.8) events, post-trial = 1.1 (0.8) events; p = 0.88] were not affected by the 5-week regimen. The sensation of cold-induced pain was transiently alleviated following the regimen (p = 0.02). The flow-mediated dilatation response of the EXP brachial artery remained unaltered [pre-trial = 5.4 (3.2)%, post-trial = 4.7 (3.6)%; p = 0.51]. Therefore, five weeks of intermittent hand exposures to alternating cold and hot stimuli do not improve finger temperature responsiveness to sustained localized cold.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 125, article id 104004
Keywords [en]
Acclimation, CIVD, Contrast baths, Habituation, Thermal adaptation, Thermal perception
National Category
Surgery
Identifiers
URN: urn:nbn:se:kth:diva-366721DOI: 10.1016/j.jtherbio.2024.104004ISI: 001349972800001PubMedID: 39488057Scopus ID: 2-s2.0-85207807550OAI: oai:DiVA.org:kth-366721DiVA, id: diva2:1983082
Note

QC 20250709

Available from: 2025-07-09 Created: 2025-07-09 Last updated: 2025-07-09Bibliographically approved

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Kölegård, RogerNorrbrand, LenaEiken, OlaKeramidas, Michail E.

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