Effect of short-term exercise-heat acclimation on ventilatory and cerebral blood flow responses to passive heating at rest in humans
Fujii N, Tsuji B, Honda Y, Kondo N, Nishiyasu T
Journal of applied physiology (Bethesda, Md. : 1985) · 20 citas
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
- Financiación independiente
- Universidad u hospital
- University of Tsukuba
- Gobierno
- Japan Society for the Promotion of Science
- Gobierno
- Ministry of Education, Science, and Culture of Japan
- Gobierno
- Japan Society of the Promotion of Science
- Sin clasificar
- The Center of Excellence (COE)
- Subvenciones
- Japan Society for the Promotion of Science (25242061)
Según 5 financiadores declarados.
Publicación
- Publicado
- 2015-07-09 · J Appl Physiol (1985) · vol. 119 · número 5 · págs. 435–444
- Editorial
- American Physiological Society
- Citado
- 26 citas · más que el 77% de estudios similares · 1.1× el promedio de su campo
- Referencias
- 57 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Climate Change and Health Impacts · Thermal Regulation in Medicine
- Palabras clave
- Hyperventilation, Ventilation (architecture), Thermoregulation, Respiratory minute volume, Medicine, Hyperthermia, Chemistry, Cerebral blood flow, Anesthesia, Vasodilation, Internal medicine, Cardiology, Respiratory system
- MeSH
- humans, hyperventilation, fever, exercise, heating, acclimatization, body temperature regulation, sweating, homeostasis, plasma volume, cerebrovascular circulation, rest, adult, male, cold temperature, hot temperature, arterial pressure
5 autores
- Naoto Fujii🇯🇵🇨🇦University of Tsukuba; University of Ottawa
- Bun Tsuji🇯🇵University of Tsukuba
- Yasushi Honda🇯🇵University of Tsukuba
- Narihiko Kondo🇯🇵Kobe University
- Takeshi Nishiyasu🇯🇵 · autor de correspondenciaUniversity of Tsukuba
Resumen
El texto original del estudio, en el idioma en que se publicó.
Hyperthermia induces hyperventilation and cerebral hypoperfusion in resting humans. We tested the hypothesis that short-term exercise-heat acclimation would alleviate those effects. Twenty healthy male subjects were divided into two groups that performed exercise training in the heat (TR-HEAT, n = 10) or cold (TR-COLD, n = 10). Before and after the training, the subjects in both groups participated in passive-heat tests at rest. Training was performed at 37°C (TR-HEAT) or 10°C (TR-COLD) and entailed four 20-min bouts of cycling at 50% peak oxygen uptake separated by 10-min recoveries daily for 6 consecutive days. After TR-HEAT, esophageal temperature was lowered when measured before and during passive heating, as was the esophageal temperature threshold for cutaneous active vasodilation, whereas plasma volume was increased (all P 0.05). TR-HEAT had no significant effect on passive heating-induced increases in minute ventilation, even when evaluated as the esophageal temperature threshold for increases in minute ventilation and the slope relating minute ventilation to esophageal temperature (all P > 0.05). By contrast, TR-HEAT attenuated the passive heating-induced reduction in the cerebral vascular conductance index (middle cerebral artery mean blood velocity/mean arterial pressure) (all P 0.05). These data suggest that in resting heated humans, short-term heat acclimation achieved through moderate-intensity exercise training (i.e., 50% peak oxygen uptake) in the heat does not influence hyperthermia-induced hyperventilation, but it does potentially attenuate cerebral hypoperfusion.
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