1996-2017
All Rights Reserved. Online Journal of Veterinary
Research. You may not store these pages in any form except for your own
personal use. All other usage or distribution is illegal under international
copyright treaties. Permission to use any of these pages in any other way
besides the before mentioned must be gained in writing from the publisher. This article is
exclusively copyrighted in its entirety to OJVR. This article may be copied
once but may not be, reproduced or re-transmitted without the express
permission of the editors. This journal satisfies the refereeing requirements
(DEST) for the Higher Education Research Data Collection (Australia). Linking:
To link to this page or any pages linking to this page you must link directly
to this page only here rather than put up your own page
OJVRTM
Online Journal of Veterinary Research©
Volume
21(3):135-140, 2017.
Serum muscle enzymes and Mg+2 in horses finalizing
and/or disqualified from endurance races.
Cinthia B. S. Dumont, Kaique
Nogueira, Anna C. Santos,
André R. C. Barreto-Vianna, Carolina da S. Leite, Luciana P. Iglesias, Eduardo M. M. Lima.
Anatomy of Domestic Animals, Faculty of Agronomy and Veterinary
Medicine, University of Brasilia, Brasilia,
DF, Brazil
Email: limaemm@unb.br;
ABSTRACT
Dumont CBS, Nogueira K, Santos AC, Barreto-Vianna
ARC, Da S Leite C, Iglesias LP, Lima EMM., Serum muscle enzymes and Mg+2 in
horses finalizing, and disqualified from endurance races. Onl
J Vet Res., 21(3):135-140, 2017. Exercise increases metabolic oxygen
consumption inducing oxidative stress in racing horses. Differences in serum magnesium (Mg+2), creatine
kinase (CK), lactate dehydrogenase (LDH) and aspartate transaminase (AST)
levels between purebred Arabian finalist race horses and those disqualified
from racing are described. Horses were disqualified at 30, 40, 60km (G1) and
72, 90 and 140km (G2) endurance races. Finalists were raced to 90km (G3).
Venous blood was taken immediately after racing or disqualification for
determination of Mg+2, AST, CK and LDH. Enzyme values were above
resting published normal ranges in horses. Serum AST was ~54% higher in long race distance horses
compared to those in short/medium distance races (P<0.05). There was a ~68%
difference (P<0.05) in serum LDH between
disqualified horses. Mg+2 values were not statistically
different between groups but higher values occurred in horses that traveled
greater distances. Results suggested that even in disqualified horses, effort
did not induce muscle injury or affect CK values.
Possibly, racing horses to pre-established distances
maintained health after the end of the races as G2 horses were raced further than
finalists. High serum Mg, CK, AST and LDH values in racing
horses suggested that a transient physiological acute inflammation affecting myocyte
cell membrane permeability could have occurred. Monitoring of endurance horses
is necessary to prevent muscle injury.
Key
words: Effort physiology, Equine athletes, Ions, Muscle
lesions.
FULL-TEXT(SUBSCRIPTION) or order article.