학술논문
Influence of topical capsaicin cream on thermoregulation and perception during acute exercise in the heat.
Document Type
Academic Journal
Author
Rosales AM; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA; School of Integrative Physiology and Athletic Training, Montana Center for Work Physiology and Exercise Metabolism, University of Montana, 32 Campus Drive, Missoula, MT, 59812, USA.; Powers M; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA.; Walters MJ; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA.; McGlynn ML; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA.; Collins CW; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA.; Slivka DR; School of Health and Kinesiology, University of Nebraska at Omaha, 6001 Dodge Street, Omaha, NE, 68182, USA; School of Integrative Physiology and Athletic Training, Montana Center for Work Physiology and Exercise Metabolism, University of Montana, 32 Campus Drive, Missoula, MT, 59812, USA. Electronic address: dustin.slivka@mso.umt.edu.
Source
Publisher: Pergamon Press Country of Publication: England NLM ID: 7600115 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 0306-4565 (Print) Linking ISSN: 03064565 NLM ISO Abbreviation: J Therm Biol Subsets: MEDLINE
Subject
Language
English
ISSN
0306-4565
Abstract
Purpose: Determine if topical capsaicin, a transient receptor potential vanilloid heat thermoreceptor activator, alters thermoregulation and perception when applied topically prior to thermal exercise.
Methods: Twelve subjects completed 2 treatments. Subjects walked (1.6 m s-1 , 5% grade) for 30 min in the heat (38 °C, 60% relative humidity) with either a capsaicin (0.025% capsaicin) or control cream applied to the upper (shoulder to wrist) and lower (mid-thigh to ankle) limbs covering ∼50% body surface area. Skin blood flow (SkBF), sweat (rate, composition), heart rate, temperature (skin, core), and perceived thermal sensation were measured prior to and during exercise.
Results: The relative change in SkBF was not different between treatments at any time point (p = 0.284). There were no differences in sweat rate between the capsaicin (1.23 ± 0.37 L h-1 ) and control (1.43 ± 0.43 L h -1 , p = 0.122). There were no differences in heart rate between the capsaicin (122 ± 38 beats·min -1 ) and control (125 ± 39 beats·min -1 , p = 0.431). There were also no differences in weighted surface (p = 0.976) or body temperatures (p = 0.855) between the capsaicin (36.0 ± 1.7 °C, 37.0 ± 0.8 °C, respectively) and control (36.0 ± 1.6 °C, 36.9 ± 0.8 °C, respectively). The capsaicin treatment was not perceived as hotter than the control treatment until minute 30 of exercise (2.8 ± 0.4, 2.5 ± 0.5, respectively, p = 0.038) CONCLUSIONS: Topical capsaicin application does not alter whole-body thermoregulation during acute exercise in the heat despite perceiving the treatment as hotter late in exercise.
Competing Interests: Declaration of competing interest The authors declare no competing interests.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Methods: Twelve subjects completed 2 treatments. Subjects walked (1.6 m s
Results: The relative change in SkBF was not different between treatments at any time point (p = 0.284). There were no differences in sweat rate between the capsaicin (1.23 ± 0.37 L h
Competing Interests: Declaration of competing interest The authors declare no competing interests.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)