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Horm Metab Res 1979; 11(3): 246-251
DOI: 10.1055/s-0028-1092718
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© Georg Thieme Verlag KG Stuttgart · New York

Plasma Catecholamine and Parathyroid Hormone Responses in Cattle during Treadmill Exercise at Simulated High Altitude

J. W. Blum1 , W.  Bianca1 , F.  Näf1 , P.  Kunz1 , J. A. Fischer2 , M.  Da Prada3
  • 1Institute of Animal Production, Federal Institute of Technology, Zürich, Switzerland
  • 2Research Laboratory for Calcium Metabolism, Departments of Orthopaedic Surgery and Medicine, Zürich, Switzerland
  • 3Pharmaceutical Department, F. Hoffman-La Roche & Co., Basel, Switzerland
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Publication History

Publication Date:
17 December 2008 (online)

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Abstract

When steers were exposed to treadmill exercise at a simulated altitude of 3500 m, plasma concentrations of epinephrine and norepinephrine as well as of parathyroid hormone increased within minutes. Heart rate, erythrocyte number and plasma lactic acid level rose at the same time, whereas plasma free fatty acids showed a later increase. It is concluded, that the elevated parathyroid hormone levels were probably caused by sympathetic stimulation.

Ca, EGTA titrable plasma calcium; Ca++, ionized plasma calcium; EGTA, ethylene glycol-bis(β-ammoethyl-ether)-N,N'-tetraacetate; FFA, free fatty acids; Mg, total plasma magnesium; PTH, immunoreactive parathyroid hormone; bPTH, bovine PTH

Key words

Parathyroid Hormone - Catecholamines - Treadmill Exercise - Altitude