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Home / Equine Research Bank / Equine Vet J Suppl / Influence of training on autonomic nervous function in horse...
Equine veterinary journal. Supplement2000; (30); 178-180; doi: 10.1111/j.2042-3306.1999.tb05213.x

Influence of training on autonomic nervous function in horses: evaluation by power spectral analysis of heart rate variability.

Abstract: We studied the influence of training on autonomic nervous function in the horse. For this purpose, Holter electrocardiogram (ECG) was recorded before and after training from 24 Thoroughbred horses (2-year-olds) and autonomic nervous function was evaluated by the power spectral analysis of heart rate (HR) variability. We obtained HR, low-frequency (LF) power, high-frequency (HF) power, and LF/HF ratio from recording. We set LF at 0.01-0.07 Hz and HF at 0.07-0.6 Hz. The HF power is thought to reflect primarily parasympathetic nervous function. Both the sympathetic and parasympathetic nervous systems have been shown to contribute to the LF power. The LF/HF ratio is considered as an index of the cardiac sympathovagal balance. Second degree atrioventricular blocks were found in the ECG of 3 and 5 horses before and after the training period, respectively. Ventricular premature depolarisations were detected in a horse after the training period. Heart rate decreased at night. The lowest HR values had a tendency to appear in the early morning. Both the LF and HF power tended to be higher at night. However, the LF/HF ratio was almost the same throughout the day. The HR was significantly decreased by training. Although the LF power and LF/HF ratio were significantly increased, the HF power was not changed by training. These results suggest that parasympathetic nervous activity may be fully activated even before training in this species.
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Publication Date: 2000-02-05 PubMed ID: 10659247DOI: 10.1111/j.2042-3306.1999.tb05213.xGoogle Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research paper aims to examine the impact of training on the autonomic nervous system of horses. The study uses a Holter electrocardiogram and power spectral analysis of heart rate variability from 24 Thoroughbred horses before and after training.

Research Methodology

  • The researchers used Holter Electrocardiogram (ECG) to record the heart condition and activities of 24 Thoroughbred horses before and after they underwent training.
  • To evaluate the autonomic nervous function, the team performed power spectral analysis on the recorded heart rate variability of the horses.

Data Collection

  • As part of the data collection, the researchers gathered information related to the horses’ Heart Rate (HR), low-frequency (LF) power, high-frequency (HF) power, and LF/HF ratio from the ECG records.
  • The LF was set at 0.01-0.07 Hz, and the HF at 0.07-0.6 Hz for accurate analysis of nervous functions.
  • The HF power predominantly reflects parasympathetic nervous function. The LF power, on the other hand, indicates both sympathetic and parasympathetic nervous system activities.
  • The LF/HF ratio is an index of cardiac sympathovagal balance – an important marker of autonomic nervous tension.

Findings and Results

  • After comparing the ECG records from before and after training, the authors noticed second degree atrioventricular blocks in 3 out of 24 horses before the training, and in 5 horses after the training session. They also detected ventricular premature depolarisations in a horse after the training period.
  • The Heart rate recorded lower at night, with the lowest rates appearing often in the early morning. The LF and HF power were also higher at night, but the LF/HF ratios remained virtually the same throughout the day.
  • As per the pre- and post-training data, the overall heart rate was significantly reduced by the training. While the LF power and the LF/HF ratio significantly increased following training

    • , the HF power showed no changes.

Conclusions

  • The findings from this study imply that training significantly influences the autonomic nervous functions in horses. Even though the heart rate significantly decreased with training, the parasympathetic nervous activity appeared to be fully activated even before training in the animals.
  • Additionally, the increased LF/HF ratio after training suggests the role of training in influencing the sympathetic nervous system activities. However, the HF power, predominantly reflecting the parasympathetic activities, remained unaffected by training.

Cite This Article

APA
Kuwahara M, Hiraga A, Kai M, Tsubone H, Sugano S. (2000). Influence of training on autonomic nervous function in horses: evaluation by power spectral analysis of heart rate variability. Equine Vet J Suppl(30), 178-180. https://doi.org/10.1111/j.2042-3306.1999.tb05213.x

Publication

Equine veterinary journal. Supplement
NlmUniqueID: 9614088
Country: United States
Language: English
Issue: 30
Pages: 178-180

Researcher Affiliations

Kuwahara, M
  • Department of Comparative Pathophysiology, Graduate School of Agriculture and Life Sciences, University of Tokyo, Japan.
Hiraga, A
    Kai, M
      Tsubone, H
        Sugano, S

          MeSH Terms

          • Animals
          • Autonomic Nervous System / physiology
          • Circadian Rhythm
          • Electrocardiography / methods
          • Electrocardiography / veterinary
          • Heart Rate / physiology
          • Horses / physiology
          • Physical Conditioning, Animal / physiology

          Citations

          This article has been cited 22 times.
          1. Söderlund EE, Kyröläinen H, Laitinen-Vapaavuori OM, Hyytiäinen HK. Proposed Protocol for Field Testing of Endurance Fitness of Young Labrador Retrievers. Methods Protoc 2023 Jun 28;6(4).
            doi: 10.3390/mps6040061pubmed: 37489428google scholar: lookup
          2. Seki N, Tochinai R, Sekizawa SI, Márquez MA, Fukuda K, Ohmura H, Kuwahara M. Preliminary study of heart rate variability in Criollo horses for the elucidation of their neurophysiological characteristics of autonomic nerve function. J Equine Sci 2023 Jun;34(2):55-59.
            doi: 10.1294/jes.34.55pubmed: 37405067google scholar: lookup
          3. Nissen SD, Weis R, Krag-Andersen EK, Hesselkilde EM, Isaksen JL, Carstensen H, Kanters JK, Linz D, Sanders P, Hopster-Iversen C, Jespersen T, Pehrson S, Buhl R. Electrocardiographic characteristics of trained and untrained standardbred racehorses. J Vet Intern Med 2022 May;36(3):1119-1130.
            doi: 10.1111/jvim.16427pubmed: 35488721google scholar: lookup
          4. Nyerges-Bohák Z, Nagy K, Rózsa L, Póti P, Kovács L. Heart rate variability before and after 14 weeks of training in Thoroughbred horses and Standardbred trotters with different training experience. PLoS One 2021;16(12):e0259933.
            doi: 10.1371/journal.pone.0259933pubmed: 34882704google scholar: lookup
          5. Grigg EK, Ueda Y, Walker AL, Hart LA, Simas S, Stern JA. Comparative Assessment of Heart Rate Variability Obtained via Ambulatory ECG and Polar Heart Rate Monitors in Healthy Cats: A Pilot Study. Front Vet Sci 2021;8:741583.
            doi: 10.3389/fvets.2021.741583pubmed: 34820436google scholar: lookup
          6. Gehlen H, Faust MD, Grzeskowiak RM, Trachsel DS. Association Between Disease Severity, Heart Rate Variability (HRV) and Serum Cortisol Concentrations in Horses with Acute Abdominal Pain. Animals (Basel) 2020 Sep 2;10(9).
            doi: 10.3390/ani10091563pubmed: 32887514google scholar: lookup
          7. Lindner A, Esser M, López R, Boffi F. Relationship between Resting and Recovery Heart Rate in Horses. Animals (Basel) 2020 Jan 11;10(1).
            doi: 10.3390/ani10010120pubmed: 31940806google scholar: lookup
          8. Rosselot P, Mendonça T, González I, Tadich T. Behavioral and Physiological Differences between Working Horses and Chilean Rodeo Horses in a Handling Test. Animals (Basel) 2019 Jun 29;9(7).
            doi: 10.3390/ani9070397pubmed: 31261934google scholar: lookup
          9. Mendonça T, Bienboire-Frosini C, Kowalczyk I, Leclercq J, Arroub S, Pageat P. Equine Activities Influence Horses' Responses to Different Stimuli: Could This Have an Impact on Equine Welfare?. Animals (Basel) 2019 May 29;9(6).
            doi: 10.3390/ani9060290pubmed: 31146422google scholar: lookup
          10. Lenoir A, Trachsel DS, Younes M, Barrey E, Robert C. Agreement between Electrocardiogram and Heart Rate Meter Is Low for the Measurement of Heart Rate Variability during Exercise in Young Endurance Horses. Front Vet Sci 2017;4:170.
            doi: 10.3389/fvets.2017.00170pubmed: 29090214google scholar: lookup
          11. Pohlin F, Brabender K, Fluch G, Stalder G, Petit T, Walzer C. Seasonal Variations in Heart Rate Variability as an Indicator of Stress in Free-Ranging Pregnant Przewalski's Horses (E. ferus przewalskii) within the Hortobágy National Park in Hungary. Front Physiol 2017;8:664.
            doi: 10.3389/fphys.2017.00664pubmed: 28936179google scholar: lookup
          12. Loftus L, Marks K, Jones-McVey R, Gonzales JL, Fowler VL. Monty Roberts' Public Demonstrations: Preliminary Report on the Heart Rate and Heart Rate Variability of Horses Undergoing Training during Live Audience Events. Animals (Basel) 2016 Sep 9;6(9).
            doi: 10.3390/ani6090055pubmed: 27618108google scholar: lookup
          13. Younes M, Robert C, Barrey E, Cottin F. Effects of Age, Exercise Duration, and Test Conditions on Heart Rate Variability in Young Endurance Horses. Front Physiol 2016;7:155.
            doi: 10.3389/fphys.2016.00155pubmed: 27199770google scholar: lookup
          14. Grandi LC, Ishida H. The Physiological Effect of Human Grooming on the Heart Rate and the Heart Rate Variability of Laboratory Non-Human Primates: A Pilot Study in Male Rhesus Monkeys. Front Vet Sci 2015;2:50.
            doi: 10.3389/fvets.2015.00050pubmed: 26664977google scholar: lookup
          15. Hiraga A, Sugano S. History of research in Japan on electrocardiography in the racehorse. J Equine Sci 2015;26(1):1-13.
            doi: 10.1294/jes.26.1pubmed: 25829865google scholar: lookup
          16. Yoshida M, Onda K, Wada Y, Kuwahara M. Influence of sickness condition on diurnal rhythms of heart rate and heart rate variability in cows. J Vet Med Sci 2015 Mar;77(3):375-9.
            doi: 10.1292/jvms.14-0402pubmed: 25648088google scholar: lookup
          17. Wonghanchao T, Sanigavatee K, Petchdee S, Chettaratanont K, Thongyen T, Wanichayanon B, Poochipakorn C, Chanda M. Heart Rate and Heart Rate Variability Are Affected by Age and Activity Level in Athletic Horses. Vet Sci 2025 Jun 28;12(7).
            doi: 10.3390/vetsci12070624pubmed: 40711284google scholar: lookup
          18. Wonghanchao T, Sanigavatee K, Poochipakorn C, Huangsaksri O, Chanda M. Dynamic Adaptation of Heart Rate and Autonomic Regulation During Training and Recovery Periods in Response to a 12-Week Structured Exercise Programme in Untrained Adult and Geriatric Horses. Animals (Basel) 2025 Apr 13;15(8).
            doi: 10.3390/ani15081122pubmed: 40281956google scholar: lookup
          19. Sanigavatee K, Poochipakorn C, Huangsaksri O, Vichitkraivin S, Pakdeelikhit S, Chotiyothin W, Wongkosoljit S, Wonghanchao T, Chanda M. A structured exercise regimen enhances autonomic function compared to unstructured physical activities in geriatric horses. Sci Rep 2025 Jan 20;15(1):2493.
            doi: 10.1038/s41598-025-86679-4pubmed: 39833241google scholar: lookup
          20. Santosuosso E, Léguillette R, Shoemaker S, Baumwart R, Temple S, Hemmerling K, Kell T, Bayly W. A consort-guided randomized, blinded, controlled clinical trial on the effects of 6 weeks training on heart rate variability in thoroughbred horses. J Vet Intern Med 2025 Jan-Feb;39(1):e17253.
            doi: 10.1111/jvim.17253pubmed: 39655519google scholar: lookup
          21. Wonghanchao T, Huangsaksri O, Sanigavatee K, Poochipakorn C, Chanprame S, Wongkosoljit S, Chotiyothin W, Rattanayanon N, Kiawwan R, Chanda M. Autonomic regulation in athletic horses repetitively participating in two novice jumping classes on consecutive days. Front Vet Sci 2024;11:1456733.
            doi: 10.3389/fvets.2024.1456733pubmed: 39502949google scholar: lookup
          22. Ramos GV, Santos MM, Gava FN, de Lacerda-Neto JC. Effects of conditioning on the left ventricular function of young purebred Arabian horses. PLoS One 2024;19(6):e0304724.
            doi: 10.1371/journal.pone.0304724pubmed: 38829873google scholar: lookup
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