Sélection de la langue

Gouvernement du Canada / Government of Canada

Recherche

Influence of slow versus fast increases in core temperature on prolactin and TNF-alpha

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1249/01.MSS.0000403048.41432.a6
AuteurRechercher : ; Rechercher : ; Rechercher :
FormatTexte, Allocution
ConférenceAmerican College of Sports Medicine (ACSM) 58th Annual Meeting, May 31st-June 4th, 2011, Denver, CO
Résumé
Prolactin (PRL), a pituitary hormone regulated by neurons in the hypothalamus, has been suggested as an indicator of fatigue during exercise-induced hyperthermia (EIH) given its strong relationship with body core temperature (Tco). However, the strength of this relationship during different rates of Tco increase and subsequent recovery are unknown. In addition, given the influence that systemic inflammatory cytokines, such as Tumor necrosis factor (TNF)-α, have on the pituitary gland; it would be of interest to determine the relationship between PRL and TNF-α during EIH. PURPOSE: To examine the PRL and TNF-α heat stress responses during low (slow heating) and moderate (fast heating) exercise intensities and subsequent resting or cold water immersion recovery. METHODS: Seven trained individuals (5 males, 2 females, mean ± SE: 27.0 ± 3.3 yrs, 57.9 ± 2.2 mL·kg⁻¹nim·⁻¹, 18.5 ± 2.4 % fat) underwent 4 EIH sessions (40°C, 30% R.H.) on a treadmill to a rectal temperature (Tre), measured continuously, of 39.5°C while wearing an impermeable rain suit followed by upright seated resting or 2°C ice-water immersion recovery. Venous blood was obtained at rest (PRE; prior to exercise), during exercise (Tre 38, 39, 39.5°C), the start of recovery (5 min post 39.5°C), and subsequent recovery (Tre 39, 38°C). PRL and TNF-α (high sensitivity) were measured by an ELISA and corrected for changes in plasma volume.
Date de publication
Maison d’éditionAmerican College of Sports Medicine / Wolters Kluwer
Dans
  • Medicine and Science in Sports and Exercise 43, nº 5 : 126–126.
Langueanglais
Publications évaluées par des pairsOui
Publication du CNRC
Cette publication n’est pas du CNRC

Ce sont des publications qui ont été rédigées par un auteur du CNRC, mais avant que celui-ci soit employé du CNRC.

Numéro NPARC23001376
Exporter la noticeExporter en format RIS
Signaler une correctionSignaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrementaea3b9b9-6a75-4529-a393-bad811964a50
Enregistrement créé2017-01-27
Enregistrement modifié2020-03-03
Date de modification :