+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The effects of incline on cardiopulmonary function during exercise in the horse

The effects of incline on cardiopulmonary function during exercise in the horse

Journal of Equine Science 6(2): 55-60

We investigated the effects of incline on cardiopulmonary function in five trained 2-year-old Thoroughbred horses during exercise on a high-speed treadmill. The horses began exercise at 1.5 m/s for 2 min followed by 1 min step increments at 4.0, 7.0, 8.0, 9.2, and 10.4 m/s. Each horse performed the exercise test on separate days with at least 2 days interval at four different inclines (0, 3, 6 and 10%). The sequence of exercise test was randomized. The major findings were: 1) Oxygen uptake ( ovrhdot Vo-2), carbon dioxide production ( ovrhdot Vco-2), minute ventilation ( ovrhdot V-E), tidal volume (V-T), heart rate (HR), cardiac output ( ovrhdot Qt), and % O-2 extraction increased linearly with speed and incline, however the regression estimates of the change in ovrhdot VO-2/change in speed (DELTA- ovrhdot Vo-2/DELTA-SP) increased with increasing incline. 2) ovrhdot V-E increased linearly with speed and was a function of increased V-T and respiratory frequency (f), however the linear increase in ovrhdot V-E with incline was solely due to increased V-T as f was unchanged. 3) The ovrhdot V-E/ ovrhdot Vo-2 slope for 0% incline was greater than the slope 3%, 6%, 10% incline. 4) The increase in arterio-mixed venous oxygen content difference (Ca-vDO-2) with speed and incline was mainly due to the decrease in CVO-2, whereas CaO-2 increased only slightly with incline and speed. 5) The increased ovrhdot Qt with speed and incline was due to increases in HR, as stroke volume was unchanged with speed and incline.

(PDF same-day service: $19.90)

Accession: 002984994

Download citation: RISBibTeXText

DOI: 10.1294/jes.6.55

Related references

The effects of speed and incline on function of the gluteus medius during trotting in the horse. American Zoologist 39(5): 64A, 1999

The effects of speed, load-carrying and incline on function of the vastus lateralis during trotting in the horse. American Zoologist 39(5): 64A, 1999

The effect of treadmill incline on maximal oxygen uptake, gas exchange and the metabolic response to exercise in the horse. Experimental Physiology 87(4): 499-506, 2002

Cardiopulmonary and metabolic responses to exercise in the Quarter Horse: effects of training. Equine exercise physiology 2: proceedings of the Second International Conference on Equine Exercise Physiology San Diego California August 7-11-1986 edited by Jerry R Gillespie N Edward Robinson: 1, 1987

Assessing Late Cardiopulmonary Function in Patients with Repaired Tetralogy of Fallot Using Exercise Cardiopulmonary Function Test and Cardiac Magnetic Resonance. Acta Cardiologica Sinica 31(6): 478-484, 2016

Speed and incline during thoroughbred horse racing: racehorse speed supports a metabolic power constraint to incline running but not to decline running. Journal of Applied Physiology 113(4): 602-607, 2013

Chronic beta-blocker therapy Effects on exercise left-ventricular function and cardiopulmonary exercise capacity in patients with chronic heart failure. European Heart Journal 24(Abstract Supplement): 182, August-September, 2003

Effects of propranolol on cardiopulmonary function in the pony during submaximal exercise. Equine Veterinary Journal 18(6): 485-489, 1986

The effects of LT intensity exercise training on cardiopulmonary function in obese children. Medicine & Science in Sports & Exercise 28(5 SUPPL ): S39, 1996

The effects of cigarette smoking on cardiopulmonary function and exercise tolerance in teenagers. Canadian Respiratory Journal 8(4): 289-291, 2001

Effects of diaphragm plication on pulmonary function and cardiopulmonary exercise parameters. European Journal of Cardio-Thoracic Surgery 44(4): 643-647, 2014

Cardiopulmonary adaptation to exercise in the horse--a review. Proceedings of the annual convention American Association of Equine Practitioners: ub 1983) (28th) 39-48, 1983

Effects of oral lacidipine on cardiopulmonary function at rest and during exercise in normal subjects. Journal of Cardiovascular Pharmacology 17 Suppl 4: S55-S58, 1991

Effects of low intensity exercise during the breaking period on cardiopulmonary function in Thoroughbred yearlings. Journal of Equine Science 8(1): 21-24, 1997

The metabolic cost of incline locomotion in the Svalbard rock ptarmigan (Lagopus muta hyperborea): the effects of incline grade and seasonal fluctuations in body mass. Journal of Experimental Biology 216(Pt 8): 1355-1363, 2013