Effect of an endurance race on muscle amino acids, pro- and macroglycogen and triglycerides.
Abstract: Glycogenolysis and lipolysis are essential for energy production in muscle during prolonged exercise but less is known about the role of amino acid metabolism. The aim was to study the effect of an endurance race on pro- and macroglycogen, triglycerides and amino acid concentrations in muscle and on selected blood parameters, especially the amino acid response in the blood during the recovery phase. Seven endurance-trained horses completed a race covering 100-120 km. Blood samples were collected one day before the race, after the finish and 1 and 8 days after the race. Needle biopsy specimens from the gluteus medius muscle were taken on completion of the race and 8 days postrace. The pro- and macroglycogen concentrations were lower and most amino acid concentrations were higher in the muscle after the finish of the race, than 8 days postrace, whereas the triglyceride concentrations did not differ. The concentrations of several amino acids in serum were higher during the recovery phase than before the race. The observed changes suggest that an endurance race influences amino acid metabolism and a net protein degradation may occur that persists during the recovery phase. Furthermore, the results suggest that macroglycogen is utilised to a greater extent than proglycogen during an endurance race. Further research is needed concerning amino acid metabolism during an endurance race as it seems to play an important role both for performance and recovery after exercise.
Publication Date: 2002-10-31 PubMed ID: 12405688DOI: 10.1111/j.2042-3306.2002.tb05420.xGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research investigates the impact of an endurance race on horses, focusing on pro- and macroglycogen levels, amino acids, and triglycerides within muscle tissue, and blood parameters. The study indicates that an endurance race impacts amino acid metabolism, leading to net protein degradation that may extend into the recovery phase.
Research Methods and Purpose
- The main goal of this study was to obtain a better understanding of amino acid metabolism, along with the changes in pro- and macroglycogen, and triglycerides in muscle during prolonged exercise.
- Seven endurance-trained horses were used in this study. They were made to complete an endurance race spanning 100-120 km.
- Blood samples were taken from these horses at different stages: a day before the race, right after the conclusion of the race, and one day and eight days post-race.
- Additionally, biopsy specimens from the gluteus medius muscle were obtained immediately after the race and eight days following the race.
Findings
- The muscle concentrations of pro- and macroglycogen decreased after the race, contrasting with most amino acid concentrations which increased.
- During the eight-day recovery period, triglyceride concentrations in the muscles remained consistent.
- Several amino acids in the serum showed elevated levels during the recovery phase as compared to the pre-race phase.
Interpretation and Conclusion
- These findings suggest that an endurance race significantly affects amino acid metabolism and may prompt a net protein degradation that continues throughout the recovery period.
- In addition, it is suggested from the results that during an endurance race, horses utilize macroglycogen more than proglycogen for their energy needs.
- The study concluded with a call for further research focusing on amino acid metabolism during an endurance race, as it appears to play a key role in terms of performance and post-exercise recovery.
Cite This Article
APA
Essén-Gustavsson B, Jensen-Waern M.
(2002).
Effect of an endurance race on muscle amino acids, pro- and macroglycogen and triglycerides.
Equine Vet J Suppl(34), 209-213.
https://doi.org/10.1111/j.2042-3306.2002.tb05420.x Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala.
MeSH Terms
- Amino Acids / blood
- Amino Acids / metabolism
- Animals
- Biopsy, Needle / veterinary
- Female
- Glycogen / metabolism
- Horses / metabolism
- Horses / physiology
- Male
- Muscle, Skeletal / chemistry
- Muscle, Skeletal / metabolism
- Physical Endurance / physiology
- Running / physiology
- Time Factors
- Triglycerides / metabolism
Citations
This article has been cited 3 times.- Park JW, Kim KH, Kim S, So JR, Cho BW, Song KD. Comparative metabolomic analysis in horses and functional analysis of branched chain (alpha) keto acid dehydrogenase complex in equine myoblasts under exercise stress.. J Anim Sci Technol 2022 Jul;64(4):800-811.
- Le Moyec L, Robert C, Triba MN, Billat VL, Mata X, Schibler L, Barrey E. Protein catabolism and high lipid metabolism associated with long-distance exercise are revealed by plasma NMR metabolomics in endurance horses.. PLoS One 2014;9(3):e90730.
- Li G, Lee P, Mori N, Yamamoto I, Arai T. Long term intensive exercise training leads to a higher plasma malate/lactate dehydrogenase (M/L) ratio and increased level of lipid mobilization in horses.. Vet Res Commun 2012 Jun;36(2):149-55.
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