Journal article

Effects of racing and nontraining on plasma thyroid hormone concentrations in sled dogs

JA Lee, KW Hinchcliff, RJ Piercy, KE Schmidt, S Nelson

JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION | AMER VETERINARY MEDICAL ASSOC | Published : 2004

Abstract

OBJECTIVE: To determine the effects of racing and nontraining on plasma thyroxine (T4), free thyroxine (fT4), thyroid-stimulating hormone (TSH), and thyroglobulin autoantibody (TgAA) concentrations in sled dogs and compare results with reference ranges established for dogs of other breeds. DESIGN: Cross-sectional study. ANIMALS: 122 sled dogs. PROCEDURE: Plasma thyroid hormone concentrations were measured before dogs began and after they finished or were removed from the Iditarod Trail Sled Dog Race in Alaska and approximately 3 months after the race. RESULTS: Concentrations of T4 and fT4 before the race were less than the reference range for nonsled dogs in 26% and 18% of sled dogs, respect..

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