Financiado en parte por Omron Healthcare
Local heating, but not indirect whole body heating, increases human skeletal muscle blood flow
Heinonen I, Brothers RM, Kemppainen J, Knuuti J, Kalliokoski KK, Crandall CG
Journal of applied physiology (Bethesda, Md. : 1985) · 142 citas
Etiquetas de revisión
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Cómo se estudió
- Diseño
- Ensayo clínico controlado (clasificado por nuestro filtro de IA)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiado por la industria
- Empresa
- Omron Healthcare
- Gobierno
- Academy of Finland
- Universidad u hospital
- Turun Yliopisto
- Gobierno
- National Heart, Lung, and Blood Institute
- Gobierno
- NHLBI NIH HHS
- Subvenciones
- National Heart, Lung, and Blood Institute (HL61388); National Heart, Lung, and Blood Institute (HL-84072)
Según 5 financiadores declarados.
Publicación
- Publicado
- 2011-06-17 · J Appl Physiol (1985) · vol. 111 · número 3 · págs. 818–824
- Editorial
- American Physiological Society
- Citado
- 184 citas · más que el 96% de estudios similares · 5.2× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 34 trabajos
- Acceso
- Acceso abierto (copia en repositorio)
- Áreas de investigación
- Thermoregulation and physiological responses · Infrared Thermography in Medicine · Climate Change and Health Impacts
- Palabras clave
- Blood flow, Skeletal muscle, Heat stress, Calf muscle, Chemistry, Anatomy, Medicine, Internal medicine, Animal science, Biology
- MeSH
- lower extremity, muscle, skeletal, bone and bones, skin, humans, heat stress disorders, positron-emission tomography, magnetic resonance imaging, hyperthermia, induced, analysis of variance, adaptation, physiological, up-regulation, body temperature regulation, skin temperature, regional blood flow, time factors, adult, male, hemodynamics, young adult
6 autores
- Ilkka Heinonen🇫🇮University of Turku; Turku University Hospital; Turku PET Centre
- R. Matthew Brothers🇺🇸Texas Health Dallas; Institute for Exercise and Environmental Medicine; The University of Texas Southwestern Medical Center
- Jukka Kemppainen🇫🇮Turku PET Centre
- Juhani M. Knuuti🇫🇮Turku PET Centre
- Kari K. Kalliokoski🇫🇮Turku PET Centre
- Craig G. Crandall🇺🇸 · autor de correspondenciaTexas Health Dallas; Institute for Exercise and Environmental Medicine; The University of Texas Southwestern Medical Center
Resumen
El texto original del estudio, en el idioma en que se publicó.
For decades it was believed that direct and indirect heating (the latter of which elevates blood and core temperatures without directly heating the area being evaluated) increases skin but not skeletal muscle blood flow. Recent results, however, suggest that passive heating of the leg may increase muscle blood flow. Using the technique of positron-emission tomography, the present study tested the hypothesis that both direct and indirect heating increases muscle blood flow. Calf muscle and skin blood flows were evaluated from eight subjects during normothermic baseline, during local heating of the right calf [only the right calf was exposed to the heating source (water-perfused suit)], and during indirect whole body heat stress in which the left calf was not exposed to the heating source. Local heating increased intramuscular temperature of the right calf from 33.4 ± 1.0°C to 37.4 ± 0.8°C, without changing intestinal temperature. This stimulus increased muscle blood flow from 1.4 ± 0.5 to 2.3 ± 1.2 ml·100 g⁻¹·min⁻¹ (P < 0.05), whereas skin blood flow under the heating source increased from 0.7 ± 0.3 to 5.5 ± 1.5 ml·100 g⁻¹·min⁻¹ (P < 0.01). While whole body heat stress increased intestinal temperature by ∼1°C, muscle blood flow in the calf that was not directly exposed to the water-perfused suit (i.e., indirect heating) did not increase during the whole body heat stress (normothermia: 1.6 ± 0.5 ml·100 g⁻¹·min⁻¹; heat stress: 1.7 ± 0.3 ml·100 g⁻¹·min⁻¹; P = 0.87). Whole body heating, however, reflexively increased calf skin blood flow (to 4.0 ± 1.5 ml·100 g⁻¹·min⁻¹) in the area not exposed to the water-perfused suit. These data show that local, but not indirect, heating increases calf skeletal muscle blood flow in humans. These results have important implications toward the reconsideration of previously accepted blood flow distribution during whole body heat stress.
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