Voluntary Cooling during Exercise Is Augmented in People with Multiple Sclerosis Who Experience Heat Sensitivity
| Autor: | Emma L. Reed, Alexis A Lizarraga, Nadine M. Fisher, Zachary J. Schlader, Nicole T Vargas, Scott L. Davis, Christopher L. Chapman |
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| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Hot Temperature Physical Therapy Sports Therapy and Rehabilitation Core temperature law.invention Multiple Sclerosis Relapsing-Remitting Randomized controlled trial law medicine Humans Orthopedics and Sports Medicine Exercise Fatigue Core (anatomy) business.industry Multiple sclerosis Skin temperature Middle Aged medicine.disease Turnover Anesthesia Metabolic heat production Female Skin Temperature business Heat sensitivity Body Temperature Regulation |
| Zdroj: | Medicine & Science in Sports & Exercise. 53:2405-2418 |
| ISSN: | 1530-0315 0195-9131 |
| Popis: | INTRODUCTION We tested the hypothesis that people with multiple sclerosis (MS) who experience heat sensitivity voluntarily engage in cool-seeking behavior during exercise to a greater extent than healthy controls. METHODS In a 27.0°C ± 0.2°C, 41% ± 2% RH environment, seven participants with relapsing-remitting MS who exhibited heat sensitivity and seven healthy controls completed two randomized trials cycling for 40 min (EX) at 3.5 W·kg-1 metabolic heat production, followed by 30 min recovery (REC). In one trial, participants were restricted from engaging in cooling (CON). In the other trial, participants voluntarily pressed a button to receive 2 min of ~2°C water perfusing a top (COOL). Mean skin and core temperatures and mean skin wettedness were recorded continuously. Total time in cooling provided an index of cool-seeking behavior. RPE, total symptom scores (MS only), and subjective fatigue (MS only) were recorded every 10 min. RESULTS Core temperature (+0.5°C ± 0.1°C) and skin wettedness (+0.53 ± 0.02 a.u.) increased but were not different between groups or trials at end exercise (P = 0.196) or end recovery (P = 0.342). Mean skin temperature was reduced in COOL compared with CON at end exercise (P ≤ 0.002), with no differences between groups (P ≥ 0.532). MS spent more total time in cooling during EX (MS, 13 ± 3 min; healthy, 7 ± 4 min; P < 0.001) but not REC (MS, 2 ± 1 min; healthy, 0 ± 1 min; P = 0.496). RPE was greater at end exercise in MS (P = 0.001). Total symptom scores increased during exercise (P = 0.005) but was not different between trials (P = 0.321), whereas subjective fatigue was not attenuated in the cooling trial (P = 0.065). CONCLUSION Voluntary cooling is augmented in MS but does not consistently mitigate perceptions of heat-related symptoms or subjective fatigue. |
| Databáze: | OpenAIRE |
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