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Heart rate, net transport cost and stride characteristics of horses exercising at walk and trot on positive and negative gradients

Published online by Cambridge University Press:  22 October 2009

R J Williams ,
K J Nankervis ,
G R Colborne ,
D J Marlin  and
R C Schroter
R J Williams
Affiliation:
Hartpury College, University of the West of England, Hartpury, UK Department of Bioengineering, Imperial College, London, UK
K J Nankervis
Affiliation:
Hartpury College, University of the West of England, Hartpury, UK
G R Colborne
Affiliation:
Department of Anatomy, University of Bristol, Bristol, UK
D J Marlin*
Affiliation:
Hartpury College, University of the West of England, Hartpury, UK
R C Schroter
Affiliation:
Department of Bioengineering, Imperial College, London, UK
*
*Corresponding author: [email protected]
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Abstract

Numerous studies have described the cardiorespiratory and kinematic responses of horses running on level and positive gradients, but little attention has been given to exercise on negative gradients, despite the fact that many horses compete over variable terrain. The purpose of this study was to describe the heart rate (HR), estimated net transport cost (COT) and stride characteristics of horses exercising at walk and trot on positive and negative gradients. Five horses (mean ± SD, 517 ± 42 kg) were acclimated in walk and trot on positive and negative gradients prior to data collection. HR and stride characteristics were measured over the last minute during walk (1.9 m s− 1) and trot (3.5 m s− 1) on a treadmill set at − 6, − 3, 0, 3 and 6%. Compared with level exercise, HR was higher at both 3 and 6%, and lower at − 3 and − 6% in walk and trot (P < 0.001). The estimated COT (beats kg− 1 m− 1 × 103) increased by an average of 30 and 48% at 3 and 6% gradient in walk, and by an average of 29 and 46% at trot compared with level exercise (P < 0.001), respectively. At negative gradients, COT decreased by 20 and 33% at walk, and by 17 and 24% at trot for − 3 and − 6% gradients (P < 0.001), respectively. Stride duration and stride length were longer, and stride frequency was lower at negative gradients compared with positive gradients (P < 0.001). In trot, the duty factor was increased in the forelimb and decreased in the hindlimb on negative compared with positive gradients (P < 0.001). Physiological workload in horses reduces from positive to negative gradients in walk and trot; however, the metabolic advantage of faster gaits, estimated by COT, diminishes as the gradient becomes more negative. This may reflect increased energy demands associated with maintaining balance and braking on negative slopes, and the locomotion strategy adopted.

Keywords

locomotionnet transport costheart rateefficiencytreadmill
Type
Research Paper
Information
Comparative Exercise Physiology , Volume 6 , Issue 3 , August 2009 , pp. 113 - 119
Copyright
Copyright © Cambridge University Press 2009

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Footnotes

†

Present address: English Institute of Sport, Sheffield, Coleridge Road, Sheffield S9 5DA, UK.

References

1 Hoyt, DF and Taylor, CR (1981). Gait and the energetics of locomotion in horses. Nature 292: 239–240.CrossRefGoogle Scholar
2 Eaton, MD, Evans, DL, Hodgson, DR and Rose, RJ (1995). Effect of treadmill incline and speed on metabolic rate during exercise in Thoroughbred horses. Journal of Applied Physiology 79(3): 713–716.CrossRefGoogle ScholarPubMed
3 Schroter, RC, Baylis, E and Marlin, DJ (1996). Gait, estimated net cost of transport and heat production at different speeds in Three-day-event horses. Equine Veterinary Journal 22: 16–23.CrossRefGoogle Scholar
4 Wickler, SJ, Hoyt, DF, Cogger, EA and Hirscbein, MH (2000). Preferred speed and cost of transport: The effect of incline. Journal of Experimental Biology 203: 2195–2200.CrossRefGoogle ScholarPubMed
5 Sloet van Oldruitenborgh-Oosterbaan, MM and Barneveld, A (1995). Comparison of the workload of Dutch warmblood horses ridden normally and on a treadmill. The Veterinary Record 137(6): 136–139.CrossRefGoogle ScholarPubMed
6 Hoyt, DF, Wickler, SJ and Cogger, EA (2000). Time of contact and step length: The effect of limb length, running speed, load carrying and incline. Journal of Experimental Biology 203: 221–227.CrossRefGoogle ScholarPubMed
7 Hoyt, DF, Wickler, SJ and Garcia, SF (2006). Oxygen consumption (VO2) during trotting on a 10% decline. Equine Veterinary Journal Supplement 36: 573–576.CrossRefGoogle Scholar
8 Schroter, RC and Marlin, DJ (2002). Modelling the oxygen cost of transport in competitions over ground of variable slope. Equine Veterinary Journal Supplement 34: 397–401.CrossRefGoogle Scholar
9 Margaria, R, Cerretelli, P, Aghemo, P and Sassi, G (1963). Energy cost of running. Journal Applied Physiology 18(2): 367–370.CrossRefGoogle ScholarPubMed
10 Taylor, CR, Caldwell, SL and Rowntree, VJ (1972). Running up and down hills. Science 178: 1096–1098.CrossRefGoogle ScholarPubMed
11 Raab, JL, Eng, P and Waschler, RA (1976). Metabolic cost of grade running in dogs. Journal of Applied Physiology 41(4): 532–535.CrossRefGoogle ScholarPubMed
12 Armstrong, RB, Laughlin, MH, Rome, L and Taylor, CR (1983). Metabolism of rats running up and down an incline. Journal of Applied Physiology 55: 518–521.CrossRefGoogle ScholarPubMed
13 Pivarnik, JM and Sherman, NW (1990). Responses of aerobically fit men and women to uphill/downhill walking and slow jogging. Medicine and Science in Sports and Exercise 22(1): 127–130.CrossRefGoogle ScholarPubMed
14 Minetti, AE, Ardigo, LP, et al. , (1994). Mechanical determinants of the minimum energy cost of gradient running in humans. Journal of Experimental Biology 195: 211–225.CrossRefGoogle ScholarPubMed
15 Minetti, AE, Ardigo, LP and Saibene, F (1993). Mechanical determinants of gradient walking energetics in man. Journal Physiology 472: 725–736.CrossRefGoogle ScholarPubMed
16 Wanta, DM, Nagle, FJ and Webb, P (1993). Metabolic response to graded downhill walking. Medicine and Science in Sports and Exercise 25(1): 159–162.CrossRefGoogle ScholarPubMed
17 Taylor, CR, Schmidt-Nielson, K and Raab, JL (1970). Scaling energetic cost of running to body size in mammals. American Journal of Physiology 219: 1104–1107.CrossRefGoogle ScholarPubMed
18 Taylor, CR (1985). Force development during sustained locomotion: a determinant of gait, speed and metabolic power. Journal of Experimental Biology 115: 253–262.CrossRefGoogle ScholarPubMed
19 Kram, R and Taylor, CR (1990). Energetics of running: a new perspective. Nature 346: 265–266.CrossRefGoogle ScholarPubMed
20 Taylor, CR (1994). Relating mechanics and energetics during exercise. Advances in Veterinary Science and Comparative Medicine 38A: 181–214.Google ScholarPubMed
21 Cavanagh, PR and Williams, KR (1982). The effect of stride length variation on oxygen uptake during middle distance running. Medicine and Science in Sport and Exercise 14: 30–35.CrossRefGoogle Scholar
22 Roberts, TJ, Kram, R, Weyland, PG and Taylor, CR (1998). Energetics of bipedal running. I. Metabolic cost of generating force. Journal of Experimental Biology 201: 2745–2751.CrossRefGoogle ScholarPubMed
23 Lindholm, A and Saltin, B (1974). The physiological and biomechanical response of standardbred horses to exercise of varying speed and duration. Acta Veterinaria Scandinavica 15: 310–324.CrossRefGoogle Scholar
24 Thomas, DP and Fregin, GF (1981). Cardiorespiratory and metabolic responses to treadmill exercise in the horse. Journal Applied Physiology 50: 9–18.CrossRefGoogle ScholarPubMed
25 Gottlieb-Vedi, M, Essen-Gustavsson, B and Persson, SGB (1991). Draught load and speed compared by submaximal tests on a treadmill. In: Persson, SGB, Lindolm, A and Jeffcott, LB (eds) Equine Exercise Physiology 3. Davis, CA: ICEEP Publications, pp. 92.Google Scholar
26 Thornton, J, Pagan, J and Persson, S (1987). The oxygen cost of weight loading and inclined treadmill exercise in the horse. In: Gillespie, JR and Robinson, NE (eds) Equine Exercise Physiology 2. Proceedings of the Second International Conference on Equine Exercise Physiology, San Diego, California, August 7–11, 1986, Davis, CA: ICEEP Publications, pp. 206–215.Google Scholar
27 Hiraga, A, Kai, M, Kubo, K, Yamaya, Y and Erickson, BK (1995). The effects of incline on cardiopulmonary function during exercise in the horse. Journal of Equine Science 6(2): 55–60.CrossRefGoogle Scholar
28 Sexton, WL and Erickson, HH (1990). Effects of treadmill elevation on heart rate, blood lactate concentration and packed cell volume during graded submaximal exercise in ponies. Equine Veterinary Journal Supplement 9: 57–60.CrossRefGoogle Scholar
29 Minetti, AE, Moia, C, Roi, GS, Susta, D and Ferretti, G (2002). Energy cost of walking and running at extreme uphill and downhill slopes. Journal of Applied Physiology 93(3): 1039–1046.CrossRefGoogle ScholarPubMed
30 Robergs, RA, Wagner, DR and Skemp, KM (1997). Oxygen consumption and energy expenditure of level versus downhill running. Journal of Sports Medicine and Physical Fitness 37: 168–174.Google ScholarPubMed
31 Delp, MD, Duan, C, Ray, CA and Armstrong, RB (1999). Rat hindlimb muscle blood flow during level and downhill locomotion. Journal of Applied Physiology 86: 564–568.CrossRefGoogle ScholarPubMed
32 McDonough, P, Kindig, CA, Hildreth, TS, Behnke, BJ, Erickson, HH and Poole, DC (2002). Effect of body incline on cardiac performance. Equine Veterinary Journal Supplement 506–509.CrossRefGoogle ScholarPubMed
33 Robert, C, Valette, JP and Denoix, JM (2000). The effects of treadmill inclination and speed on the activity of two hindlimb muscles in the trotting horse. Equine Veterinary Journal 32: 312–317.CrossRefGoogle ScholarPubMed
34 Kai, M, Hiraga, A, Kubo, K and Tokurik, M (1997). Comparison of stride characteristics in a cantering horse on a flat and inclined treadmill. Equine Veterinary Journal Supplement 23: 76–79.CrossRefGoogle Scholar
35 Sloet van Oldruitenborgh-Oosterbaan, MM, Barneveld, A and Schamhardt, HC (1997). Effects of treadmill inclination on kinematics of the trot in Dutch Warmblood horses. Equine Veterinary Journal Supplement 23: 71–75.CrossRefGoogle Scholar
36 Gillis, GB and Biewener, AA (2002). Effects of surface grade on proximal hindlimb muscle strain and activation during rat locomotion. Journal of Applied Physiology 93: 1731–1743.CrossRefGoogle ScholarPubMed
37 Gabaldon, AM, Nelson, FE and Roberts, TJ (2004). Mechanical function of two ankle extensors in wild turkeys: shifts from energy production to energy absorption during incline versus decline running. Journal of Experimental Biology 207: 2277–2288.CrossRefGoogle ScholarPubMed
38 Marsh, RL, Ellerby, DJ, Carr, JA, Henry, HT and Buchanan, CI (2004). Partitioning the energetics of walking and running: swinging the limbs is expensive. Science 303: 80–83.CrossRefGoogle ScholarPubMed
39 Barrey, E, Galloux, P, Valette, JP, Auvinet, B and Wolter, R (1993). Stride characteristics of overground versus treadmill locomotion in the saddle horse. Acta Anat (Basel) 146(2–3): 90–94.CrossRefGoogle ScholarPubMed
40 Dutto, DJ, Hoyt, DF, Cogger, EA and Wickler, SJ (2004). Ground reaction forces in horses trotting up an incline and on the level over a range of speeds. Journal of Experimental Biology 207: 3507–3514.CrossRefGoogle Scholar