Document Detail


Effect of repeated exercise and recovery on heart rate variability in elite trotting horses during high intensity interval training.
MedLine Citation:
PMID:  17402419     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
REASONS FOR PERFORMING STUDY: Interval training is a commonly used training method for trotting horses. In addition, trainers are provided with efficient and inexpensive heart rate monitor devices for the management of training. HYPOTHESIS: Since the high frequency (HF) frequency peak (fHF) of heart rate variability (HRV) corresponds to the breathing frequency in combination with stride frequency during trotting, it is hypothesised that modifications of breathing and stride frequencies induced by repeated exercise could be detected from fHF. METHODS: RR interval time series of 7 trotting horses were recorded during an interval training session. Interval training was made up of 5 successive 800 m high-velocity trotting runs (H1, H2...H5) separated by 1 min recovery bouts at low speed (R1, R2...R5). Fast Fourier transform (FFT) and Poincaré plot analysis techniques were applied to RR series. RESULTS: Repeated exercise had significant effects on HRV components during interval training. Despite constant trotting velocities during high-speed and recovery, repetition induced a decrease in mean RR interval (H1: 295 +/- 19 vs. H5: 283 +/- 15 msec, P<0.05) and in the root mean square of successive differences in RR series (RMSSD; H1: 6.31 +/- 1.28 vs. H5: 5.31 +/- 1.31 msec, P<0.05). Furthermore, high-speed and recovery repetitions induced an increase in fHF (H1: 1.37 +/- 0.35 vs. H5: 1.62 +/- 0.40 Hz and R1: 0.22 +/- 0.02 vs. R4: 0.64 +/- 0.38 Hz, P<0.05). Hence, recovery induced a decrease in the s.d. of the successive RR series (SDRR; R3: 10.5 +/- 3.96 vs. R5: 6.17 +/- 2.65 msecs, P>0.05) and in the long term index of Poincaré plot (SD2; R1: 43.29 +/- 28.90 vs. R5: 18.19 +/- 9.35 msecs, P<0.05). CONCLUSIONS: The observed increase in fHF during the interval training could be induced by alterations of the coupling between breathing and stride frequency linked to the emergence of fatigue. The decrease in SD2 and SDRR during successive recovery bouts could be linked with a deterioration of the recovery pattern. POTENTIAL RELEVANCE: HRV can provide breathing frequency data of Standardbreds during training without any respiratory device. Furthermore, HRV could provide useful makers of the emergence of fatigue states during training.
Authors:
F Cottin; E Barrey; P Lopes; V Billat
Related Documents :
12422959 - Developmental changes in heart rate variability during exposure to prolonged hypercapni...
8827949 - Overfeeding, autonomic regulation and metabolic consequences.
15120749 - Influence of sympathetic autonomic arousal on cortical arousal: implications for a ther...
18997439 - Inward-attention meditation increases parasympathetic activity: a study based on heart ...
10219849 - Postprandial changes of sympathovagal balance measured by heart rate variability.
9818159 - Does plasma l-arginine level play a role in regulation of blood pressure during exercis...
7637549 - Stimulation of myofibrillar protein synthesis in hindlimb suspended rats by resistance ...
12039439 - Genomic plasticity, energy allocations, and the extended longevity phenotypes of drosop...
1664629 - The addition of sodium bicarbonate to prilocaine solution during i.v. regional anesthesia.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Equine veterinary journal. Supplement     Volume:  -     ISSN:  -     ISO Abbreviation:  Equine Vet J Suppl     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2007-04-03     Completed Date:  2007-05-02     Revised Date:  2007-05-18    
Medline Journal Info:
Nlm Unique ID:  9614088     Medline TA:  Equine Vet J Suppl     Country:  England    
Other Details:
Languages:  eng     Pagination:  204-9     Citation Subset:  IM    
Affiliation:
Laboratory of Exercise Physiology (LEPHE), University of Evry, E.A. 3872, Genopole, Boulevard F Mitterrand, F-91025 Evry cedex, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Electrocardiography / veterinary
Fatigue / diagnosis,  veterinary*
Fourier Analysis
Heart Rate / physiology*
Horses / physiology*
Physical Conditioning, Animal / methods*,  physiology*
Respiration
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Effects of a specific endothelin-1A antagonist on exercise-induced pulmonary haemorrhage (EIPH) in t...
Next Document:  Effect of detraining on cardiorespiratory variables in young thoroughbred horses.