[en] The stress level is suggested to have a negative effect on horses during equestrian competitions, specifically in trotter racing. The main objectives of this study were to measure stress levels in Spanish Trotter Horse races with a reliable non-invasive method, and determining the threshold level of stress that leads to the best performance results and also shows when the stress perceived by the horse becomes distress. One hundred and thirty individuals were evaluated, measuring their performance (based on racing time per kilometre (TPK)) and their stress (based on eye temperature, assessed with infrared thermography, and heart rate) in different competitions. Eye temperature and heart rate measurements were collected 2 h before the race and immediately following the race, and the increases of eye temperature (∆ET) and heart rate were estimated. ∆ET and eye temperature before the race showed significant differences related to the performance level after a GLM analysis. The segmented regression analysis indicated that when the animal was more stressed before the race than just after finishing it (∆ET < 0), it showed the poorest competition results, and from the breakpoint (reached at ∆ET = − 0.97%), horse's performance started to improve. When comparing eye temperature variables and TPK with a response surface plot, TPK was optimum (77.27 s) when the eye temperature before the race and ∆ET reached values of 37.61 °C and 7.57%, respectively. Therefore, the stress levels of the horse before the race influence its competition results, and ∆ET during competitions reaching a threshold point is related to an improvement in performance results.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Negro, Sara; Universidad de Sevilla
Bartolomé, Ester; Universidad de Sevilla
Molina, Antonio; Universidad de Córdoba
Sole Berga, Marina ; Université de Liège - ULiège > Département des productions animales (DPA) > GIGA-R : Génomique animale
Gómez, M. Dolores; Universidad de Sevilla
Valera-Córdoba, Mercedes; Universidad de Sevilla
Language :
English
Title :
Stress level effects on sport performance during trotting races in Spanish Trotter Horses
Aschbacher, K., Kornfeld, S., Picard, M., Puterman, E., Havel, P.J., Stanhope, K., Lustig, R.H., Epel, E., Chronic stress increases vulnerability to diet-related abdominal fat, oxidative stress, and metabolic risk. Psychoneuroendocrinology 46 (2014), 14–22.
Bartolomé, E., Cockram, M.S., Potential effects of stress on the performance of sport horses. J. Equine Vet. Sci. 40 (2016), 84–93.
Bartolomé, E., Cervantes, I., Valera, M., Gutiérrez, J.P., Influence of foreign breeds on the genetic structure of the Spanish Sport Horse population. Livest. Sci. 142 (2011), 70–79.
Bartolomé, E., Sánchez, M., Molina, A., Schaefer, A., Cervantes, I., Valera, M., Using eye temperature and heart rate for stress assessment in young horses competing in jumping competitions and its possible influence on sport performance. Animal 7 (2013), 2044–2053.
Bartolomé, E., Menéndez-Buxadera, A., Valera, M., Cervantes, I., Molina, A., Genetic (co)variance components across age for Show Jumping performance as an estimation of phenotypic plasticity ability in Spanish horses. J. Anim. Breed. Genet. 130 (2013), 190–198.
Becker-Birck, M., Schmidt, A., Biau, S., Möstl, E., Morillon, B., Aurich, J., Faure, J., Aurich, C., Cortisol release in sport horses participating in equestrian competitions and events. The 6th International Equitation Science Conference (ISES), Uppsala, Sweden, 2010.
Cayado, P., Munoz-Escassi, B., Dominguez, C., Manley, W., Olabarri, B., Sanchez de la Muela, M., Castejon, F., Marañon, G., Vara, E., Hormone response to training and competition in athletic horses. Equine Vet. J. Suppl. 36 (2006), 274–278.
Cook, N., Schaefer, A., Warren, L., Burwash, L., Anderson, M., Baron, V., Adrenocortical and metabolic responses to ACTH injection in horses: an assessment by salivary cortisol and infrared thermography of the eye. Can. J. Anim. Sci., 81, 2001, 621.
Covalesky, M., Russoniello, C., Malinowski, K., Effects of show-jumping performance stress on plasma cortisol and lactate concentrations and heart rate and behavior in horses. J. Equine Vet. Sci. 12 (1992), 244–251.
Gómez, M., Valera, M., Molina, A., Genetic analysis of racing performance of trotter horses in Spain. Livest. Prod. Sci. 127 (2010), 197–204.
Gómez, M., Menendez-Buxadera, A., Valera, M., Molina, A., Estimation of genetic parameters for racing speed at different distances in young and adult Spanish Trotter horses using the random regression model. J. Anim. Breed. Genet. 127 (2010), 385–394.
Hall, C., Burton, K., Maycock, E., Wragg, E., A preliminary study into the use of infrared thermography as a means of assessing the horse's response to different training methods. J. Vet. Behav. 6 (2011), 291–292.
Hausberger, M., Bruderer, C., Le Scolan, N., Pierre, J.S., Interplay between environmental and genetic factors in temperament/personality traits in horses (Equus Caballus). J. Comp. Psychol., 118, 2004, 434.
Katona, O., Osterkorn, K., Genetic-statistical analysis of racing time in the German Trotter population. Ziichtungskunde 49 (1977), 185–192.
Kinnunen, S., Laukkanen, R., Haldi, J., Hanninen, O., Atalay, M., Heart rate variability in trotters during different training periods. Equine Vet. J. 38 (2006), 214–217.
Koenen, E.P.C., Aldridge, L.I., Philipsson, J., An overview of breeding objectives for warmblood sport horses. Livest. Prod. Sci. 88 (2004), 77–84.
Kuipers, H., Keizer, H.A., Overtraining in elite athletes: review and directions for the future. Sports Med. 6 (1988), 79–92.
Langlois, B., Blouin, C., Annual, career or single race records for breeding value estimation in race horses. Livest. Prod. Sci. 107 (2007), 132–141.
Munsters, C.C., Visser, K.E., van den Broek, J., van Oldruitenborgh-Oosterbaan, M.M.S., The influence of challenging objects and horse-rider matching on heart rate, heart rate variability and behavioural score in riding horses. Vet. J. 192 (2012), 75–80.
Oki, H., Sasaki, Y., Estimation of genetic trend in racing time of thoroughbred horses in Japan. Anim. Sci. Tech. 67 (1995), 120–124.
Physick-Sheard, P., Marlin, D., Thornhill, R., Schroter, R., Frequency domain analysis of heart rate variability in horses at rest and during exercise. Equine Vet. J. 32 (2000), 253–262.
Posta, J., Komlósi, I., Mihók, S., Breeding value estimation in the Hungarian Sport Horse population. Vet. J. 181 (2009), 19–23.
Sánchez, M.J., Bartolomé, E., Valera, M., Genetic study of stress assessed with infrared thermography during dressage competitions in the Pura Raza Español horse. Appl. Anim. Behav. Sci. 174 (2016), 58–65.
SAS Institute, SAS version 9.2. 1999, SAS Institute Inc., Cary, NC, USA.
Schmidt, A., Möstl, E., Wehnert, C., Aurich, J., Müller, J., Aurich, C., Cortisol release and heart rate variability in horses during road transport. Horm. Behav. 57 (2010), 209–215.
Stewart, M., Webster, J., Schaefer, A., Cook, N., Scott, S., Infrared thermography as a non-invasive tool to study animal welfare. Anim. Welf. 14 (2005), 319–325.
Thayer, J.F., Hahn, A.W., Pearson, M.A., Sollers, J. 3rd, Johnson, P.J., Loch, W.E., Heart rate variability during exercise in the horse. Biomed. Sci. Instrum. 34 (1997), 246–251.
Thiruvenkadan, A.K., Kandasamy, N., Panneerselvam, S., Inheritance of racing performance of trotter horses: an overview. Livest. Sci. 124 (2009), 163–181.
Valera, M., Bartolomé, E., Sánchez, M.J., Molina, A., Cook, N., Schaefer, A., Changes in eye temperature and stress assessment in horses during show jumping competitions. J. Equine Vet. Sci. 32 (2012), 827–830.
Voss, B., Mohr, E., Krzywanek, H., Effects of aqua-treadmill exercise on selected blood parameters and on heart-rate variability of horses. J. Vet. Med. A 49 (2002), 137–143.
