Synchronization of locomotion and respiration in trotting ponies

Zentralblatt für Veterinärmedizin. Reihe A
T ArtP Lekeux

Abstract

The aim of the present experiment was to investigate the hypothesis that there is a respiration-locomotion coupling in trotting equines. Therefore the respiratory airflow (V), the gastric pressure (Pga) and pleural pressure (Ppl) changes and the step frequency (SF) were simultaneously recorded in 5 trotting ponies (body weight: 255 +/- 15 kg; age: 3.5 +/- 0.4 years). Airflow was measured using a Fleisch pneumotachograph fixed on a face mask. Esophageal and gastric balloon catheters coupled to pressure transducers allowed the recording of Ppl and Pga. The exercise was performed on a treadmill and consisted of 1 min walking (1.5 m.s-1), 1 min slow trotting (3.0 m.s-1)(Trot 1) and 3 min fast trotting (3.5 m.s-1)(Trot 2). Data were continuously recorded before and during exercise. At walk and Trot 1, none of the ponies displayed a coupling between SF and the respiratory frequency (RF). In one pony, SF and RF were coupled at a constant ratio of 2:1 during Trot 2 while two other ponies displayed the same coupling only up to the second minute of Trot 2. In the two last ponies, a coupling occurred at the third minute of Trot 2. In all ponies, the peaks in Pga occurring during expiration occurred always simultaneously with the first and...Continue Reading

References

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Citations

Jan 4, 1998·Respiration Physiology·D M AinsworthJ A Dempsey
May 22, 1998·Journal of Veterinary Internal Medicine·J E Hare, L Viel
Sep 1, 1994·Research in Veterinary Science·D L EvansR J Rose
May 27, 2011·Equine Veterinary Journal. Supplement·F CottinE Barrey
Sep 1, 1995·Research in Veterinary Science·G M GauvreauW N McDonell
Apr 4, 2007·Equine Veterinary Journal. Supplement·C CotrelA Courouce-Malblanc
Feb 5, 2000·Equine Veterinary Journal. Supplement·G NymanP Funkquist

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