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Selected Works of Russell W. Brown
Article
Exercise Endurance in Rats: Roles of Type I and II Corticosteroid Receptors
Physiology & Behavior (1993)
  • Lynn D. Devenport, University of Oklahoma
  • Debby Doughty, University of Oklahoma
  • B. Heiberger, University of Oklahoma
  • D. Burton, University of Oklahoma
  • Ryan P. Brown, Rice University
  • Rex D. Stith, University of Oklahoma
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Abstract
Intact and adrenalectomized (ADX) rats were mildly food deprived and administered dexamethasone (type II agonist), aldosterone (type I agonist), corticosterone (mixed agonist), or vehicle 24 and 2 h prior to forced exercise in a treadmill. The endurance of intact animals was unaffected by hormone treatments. Adrenalectomy greatly advanced the onset of fatigue, and aldosterone exacerbated the effect of adrenalectomy. Corticosterone improved endurance in ADX rats, and dexamethasone was even more potent in this respect. Aldosterone slowed deprivation-induced weight loss in ADXs, while corticosterone and especially dexamethasone accelerated loss. Thus, endurance was directly related to body weight loss, and presumably to the fuels released by such loss. The results extend the type I-type II fuctional dichotomy to the delivery of utilizable energy for metabolically active tissues.
Keywords
  • glucocorticoids,
  • effects on body weight,
  • energy deposition and mobilization,
  • type I and II corticosteroid receptor agonists,
  • corticosteroids,
  • catabolism and anabolism,
  • locomotor endurance,
  • corticosteroid receptor functions,
  • adrenalectomy,
  • locomotor fatigue
Disciplines
Publication Date
June, 1993
DOI
10.1016/0031-9384(93)90375-P
Citation Information
Lynn D. Devenport, Debby Doughty, B. Heiberger, D. Burton, et al.. "Exercise Endurance in Rats: Roles of Type I and II Corticosteroid Receptors" Physiology & Behavior Vol. 53 Iss. 6 (1993) p. 1171 - 1175 ISSN: 0031-9384
Available at: http://works.bepress.com/russell-brown/57/