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Using eye temperature and heart rate for stress assessment in young horses competing in jumping competitions and its possible influence on sport performance

  • E. Bartolomé (a1), M. J. Sánchez (a1), A. Molina (a2), A. L. Schaefer (a3), I. Cervantes (a4) and M. Valera (a1)...


The aims of this study were, first, to evaluate eye temperature (ET) with infrared thermography and heart rate (HR) to measure stress in horses during show jumping competitions and their relationship with competition results, and second, to evaluate the influence of different extrinsic and intrinsic factors of the horse on the stress measurements analysed. One hundred and seventy-three Spanish Sport Horses were analysed for ET and HR, and these measurements were taken 3 h before the competition, just after and 3 h after it. Two interval measurements were also assessed for each parameter. Positive significant correlations were found between ET and HR, measured before (r=0.23), just after competition (r=0.28) and for the later interval (r=0.26), whereas negative correlations with competition results were found only for ET when measured just after competing (r=−0.25). Two intrinsic factors (genetic line and age) and no extrinsic factors showed significant differences for ET, whereas one intrinsic factor (age) and two extrinsic factors (journey duration and number of training hours) showed significant differences for HR. The marginal means showed significantly higher ET values for the Anglo-Arab genetic line and for 5-year-old animals. HR values were significantly higher for 4-year-old animals, for horses which had travelled 4 to 6 h and for horses that had 3 to 6 h of daily training. This study suggests that, although ET and HR seemed to share a similar physiological basis, the factors that most influenced each parameter were different. Finally, ET seems to be a suitable tool for assessing stress during show jumping competitions in horses.


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Alio, J and Padron, M 1982. Influence of age on the temperature of the anterior segment of the eye. Ophthalmic Research 14, 153159.
Barrey, E and Langlois, B 2000. Sports science. In The Elite Show Jumper: Conference on Equine Sports Medicine and Science (ed. A Lindner), pp. 1324. Wageningen Academic Publishers, Essen, Germany.
Bartolomé, E, Cervantes, I, Valera, M and Gutiérrez, JP 2011. Influence of foreign breeds on the genetic structure of the Spanish Sport Horse population. Livestock Science 142, 7079.
Bartolomé, E, Cervantes, I, Gómez, MD, Molina, A and Valera, M 2008. Influence of environmental factors on the sport performance of the horse, in an objective selection test (show Jumping). Itea-Información Técnica Económica Agraria 104, 262267.
Becker-Birck, M, Schmidt, A, Lasarzik, J, Aurich, J, Möstl, E and Aurich, C 2013. Cortisol release and heart rate variability in sport horses participating in equestrian competitions. Journal of Veterinary Behavior 8, 8794.
Benjamini, Y and Hochberg, Y 1995. Controlling the false discovery rate – a new and powerful approach to multiple testing. Journal of the Royal Statistical Society Series B 57, 12891300.
Bitschnau, C, Wiestner, T, Trachsel, DS, Auer, JA and Weishaupt, MA 2010. Performance parameters and post exercise heart rate recovery in Warmblood sports horses of different performance levels. Equine Veterinary Journal 42 (Suppl. 38), 1722.
Clark, JD, Rager, DR and Calpin, JP 1997. Animal well-being. IV. Specific assessment criteria. Laboratory Animal Science 47, 586597.
Clayton, HM and Barlow, DA 1989. The effect of fence height and width on the limb placements of show jumping horses. Journal of Equine Veterinary Science 9, 179185.
Cook, NJ, Schaefer, AL and Church, JS 2006. Nutritional therapy modulates stress responses of elk (Cervus elaphus canadensis) to removal of velvet antler. Journal of Veterinary Research 10, 2025.
Cook, NJ, Schaefer, AL, Warren, L, Burwash, L, Anderson, M and Baron, V 2001. Adrenocortical and metabolic responses to ACTH injection in horses: an assessment by salivary cortisol and infrared thermography of the eye. Canadian Journal of Animal Science 81, 621.
Couroucé, A, Geffroy, O, Barrey, E, Auvinet, B and Rose, RJ 1999. Comparison of exercise tests in French trotters under training track, racetrack and treadmill conditions. Equine Veterinary Journal 31 (Suppl. 30), 528532.
Covalesky, ME, Russoniello, CR and Malinowski, K 1992. Effects of show jumping performance stress on plasma cortisol and lactate concentrations and heart rate and behavior in horses. Journal of Equine Veterinary Science 12, 244251.
D’Eath, RB, Turner, SP, Kurt, E, Evans, G, Thölking, L, Looft, H, Wimmers, K, Murani, E, Klont, R, Foury, A, Ison, SH, Lawrence, AB and Mormède, P 2010. Pigs’ aggressive temperament affects pre-slaughter mixing aggression, stress and meat quality. Animal 4, 604616.
Dantzer, R and Mormède, P 1983. Stress in farm animals: a need for reevaluation. Journal of Animal Science 57, 618.
Droste, SK, Gesing, A, Ulbricht, S, Muller, MB, Linthorst, AC and Reul, JM 2003. Effects of long-term voluntary exercise on the mouse hypothalamic-pituitary-adrenocortical axis. Endocrinology 144, 30123023.
Eddy, AL, Van Hoogmoed, LM and Snyder, JR 2001. The role of thermography in the management of equine lameness. The Veterinary Journal 162, 172181.
Evans, D 2008. Exercise testing in the field. In Equine exercise physiology: the science of exercise in the athletic horse (ed. KW Hinchcliff, RJ Geor and AJ Kaneps), pp. 1228. Elsevier Limited, Philadelphia, USA.
Fazio, E, Medica, P, Cravana, C, Giacoppo, E and Ferlazzo, A 2009. Physiological variables of horses after road transport. Animal 3, 13131318.
Hall, C, Burton, K, Maycock, E and Wragg, E 2011. A preliminary study into the use of infrared thermography as a means of assessing the horse's response to different training methods. Journal of Veterinary Behavior: Clinical Applications and Research 6, 291292.
Hausberger, M, Bruderer, C, Le Scolan, N and Pierre, JS 2004. Interplay between environmental and genetic factors in temperament/personality traits in horses (Equus caballus). Journal of Comparative Psychology 118, 434446.
Horohov, DW 2008. Inmunological responses to exercise and training. In Equine exercise physiology: the science of exercise in the athletic horse (ed. KW Hinchcliff, RJ Geor and AJ Kaneps), pp. 410422. Elsevier Limited, Philadelphia, USA.
Hsieh, JC, Chan, KH, Lui, PW and Lee, TY 1990. Clinical application of infrared thermography in diagnosis and therapeutic assessment of vascular ischemic pain. Anaesthesiologica Sinica 28, 493501.
Kusunose, R and Yamanobe, A 2002. The effect of training schedule on learned tasks in yearling horses. Applied Animal Behaviour Science 78, 225233.
Langsetmo, I, Fedde, MR, Meyer, TS and Erickson, HH 2000. Relationship of pulmonary arterial pressure to pulmonary haemorrhage in exercising horses. Equine Veterinary Journal 32, 379384.
Lloyd, AS, Martin, JE, Bornett-Gauci, HLI and Wilkinson, RG 2008. Horse personality: variation between breeds. Applied Animal Behaviour Science 112, 369383.
Ludwig, N, Gargano, M, Luzi, F, Carenzi, C and Verga, M 2007. Technical note: applicability of infrared thermography as a non-invasive measurement of stress in rabbit. World Rabbit Science 15, 199206.
McCafferty, DJ 2007. The value of infrared thermography for research on mammals: previous applications and future directions. Mammal Review 37, 207223.
McGreevy, P, Warren-Smith, A and Guisard, Y 2012. The effect of double bridles and jaw-clamping crank nosebands on temperature of eyes and facial skin of horses. Journal of Veterinary Behavior: Clinical Applications and Research 7, 142148.
McMillan, FD 2005. Stress, distress, and emotion: distinctions and implications for mental well-being. In Mental health and well-being in animals (ed. FD McMillan), pp. 93111. Blackwell Publishing, Oxford, United Kingdom.
Minton, JE 1994. Function of the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system in models of acute stress in domestic farm animals. Journal of Animal Science 72, 18911898.
Moberg, GP 2000. Biological response to stress: Implications for animal welfare. In The biology of animal stress. Basic principles and implications for animal welfare (ed. GP Moberg and JA Mench), pp. 121. CABI Publishing, Wallingford, United Kingdom.
Munsters, CBM, Visser, EK, Van den Broek, J and Van Oldruitenborgh-Oosterbaan, MS 2012. The influence of challenging objects and horse-rider matching on heart rate, heart rate variability and behavioural score in riding horses. The Veterinary Journal 192, 7580.
Nakayama, K, Got, S, Karaoke, K and Nakamura, K 2005. Decrease in nasal temperature of rhesus monkeys (Macaca mulatto) in negative emotional state. Physiology & Behavior 84, 783790.
Peeters, M, Sulon, J, Beckers, JF, Ledoux, D and Vandenheede, M 2011. Comparison between blood serum and salivary cortisol concentrations in horses using an adrenocorticotropic hormone challenge. Equine Veterinary Journal 43, 487493.
SAS Institute 1999. SAS version 8.0. SAS Institute Inc., Cary, NC, USA.
Schmidt, A, Möstl, E, Wehnert, C, Aurich, J, Müller, J and Aurich, C 2010. Cortisol release and heart rate variability in horses during road transport. Hormones and Behavior 57, 209215.
Stephens, DB 1980. Stress and its measurement in domestic animals. A review of behavioural and physiological studies under field and laboratory situations. Advances in Veterinary Science & Comparative Medicine 24, 179210.
Stewart, M, Webster, JR, Schaefer, AL, Cook, NJ and Scott, SL 2005. Infrared thermography as a non-invasive tool to study animal welfare. Animal Welfare 14, 319325.
Stewart, M, Stafford, KJ, Dowling, SK, Schaefer, AL and Webster, JR 2008. Eye temperature and heart rate variability of calves disbudded with or without local anaesthetic. Physiology & Behavior 93, 789797.
Stewart, M, Webster, JR, Verkerk, GA, Schaefer, AL, Colyn, JJ and Stafford, KJ 2007. Non-invasive measurement of stress in dairy cows using infrared thermography. Physiology & Behavior 92, 520525.
Stewart, M, Stratton, RB, Beausoleil, NJ, Stafford, KJ, Worth, GM and Waran, NK 2011. Assessment of positive emotions in horses: implications for welfare and performance. Journal of Veterinary Behavior: Clinical Applications and Research 6, 296.
Tateo, A, Padalino, B, Boccaccio, M, Maggiolino, A and Centoducati, P 2012. Transport stress in horses: effects of two different distances. Journal of Veterinary Behavior: Clinical Applications and Research 7, 3342.
Thayer, JF, Hahn, AW, Pearson, MA, Sollers, JJ III, Johnson, PJ and Loch, WE 1997. Heart rate variability during exercise in the horse. Biomedical Sciences Instrumentation 34, 246251.
Thissen, D, Steinberg, L and Kuang, D 2002. Quick and easy implementation of the Benjamini–Hochberg procedure for controlling the False Positive Rate in multiple comparisons. Journal of Educational and Behavioral Statistics 27, 7783.
Ursin, H and Olff, M 1993. Psychobiology of coping and defence strategies. Neuropsychobiology 28, 6671.
Valera, M, Bartolomé, E, Sánchez, MJ, Molina, A, Cook, N and Schaefer, AL 2012. Changes in eye temperature and stress assessment in horses during show jumping competitions. Journal of Equine Veterinary Science 32, 827830.
Visser, EK, Van Reenen, CG, Van der Werf, JTN, Schilder, MBH, Knaap, JH, Barneveld, A and Blokhuis, HJ 2002. Heart rate and heart rate variability during a novel object test and a handling test in young horses. Physiology & Behavior 76, 289296.
Von Borell, E, Langbein, J, Després, G, Hansen, S, Leterrier, C, Marchant-Forde, J, Marchant-Forde, R, Minero, M, Mohr, E, Prunier, A, Valance, D and Veissier, I 2007. Heart rate variability as a measure of autonomic regulation of cardiac activity for assessing stress and welfare in farm animals – a review. Physiology & Behavior 92, 293316.
Yarnell, K, Hall, C and Billett, E 2013. An assessment of the aversive nature of an animal management procedure (clipping) using behavioral and physiological measures. Physiology & Behavior 118, 3239.



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