The aim of the study was to assess the effect of allowing racehorses to use paddocks, on the heart rate (HR). HR was used as a measure of horses’ psychosomatic response to environment effect. The study involved 90 Purebred Arabian horses divided into three groups of equal numbers of stallions and mares. The control group (C) was trained at the racetrack. The other two groups were trained in an off-the-racetrack centre and therefore, they were regularly transported to the races. One of those groups (T) was maintained in the same manner as horses at the racetrack, without access to paddocks. Horses from the other group (TP) were additionally released into a paddock every day. Each horse was examined within five three-week measuring periods, during one training season. HR was registered at rest, during saddling, and while walking with a rider. A multivariate analysis of variance (ANOVA, GLM) was used to compare HR. The significance of differences between means was determined using Tukey’s test. HR registered from 2nd to 5th measuring periods during saddling and walking was generally lower in TP than in C. For example, in stallions during saddling, HR amounted to: 54.4±14.7 vs 65.3±12.1, 53.2±13.5 vs 64.4±13.1, 55.4±12.2 vs 65.0±11.0 and 53.4±14.0 vs 66.5±13.8 beats/min, respectively. In T stallions and mares, HR tended to increase when the transportation began which was particularly pronounced at rest. The study revealed that the possibility of turnout into paddocks reduced HR in racehorses, in comparison to horses trained at racetrack. Training for horse racing in an off-the-racetrack centre with the use of paddocks was assessed as beneficial, provided the horses were used to being transported.
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Alexander S.L., Irvine C.H.G. (1998). Stress in the racing horse: Coping vs not coping. J. Equine Sci., 9: 77-81.
Art T., Lekeux P. (2005). Exercise-induced physiological adjustments to stressful conditions in sports horses. Livest. Prod. Sci., 92: 101-111.
Chaya L., Cowan E., Mc Guire B. (2006). Anote on the relationship between time spent in turnout and behaviour during turnout in horses (Equus caballus). Appl. Anim. Behav. Sci., 98: 155-160.
Del Castillo J., Schwartz L. (1997). Backyard race horse: The training manual,acomprehensive off-track program for owners and trainers. Winter Haven, Florida: Prediction Publication & Productions Press.
Evans D.L. (2003). Welfare of the racehorse during exercise training and racing. In: The welfare of horses. Springer, Netherlands, pp. 181-201.
Fazio E., Medica P., Aronica V., Grasso L., Ferlazzo A. (2008). Circulatingβ-endorphin, ACTHand cortisol level of stallions before and after short road transport: stress effect of different distance. Acta Vet. Scand., 50: 50-56.
Hada T., Onaka T., Takahashi T., Hiraga A., Yagi K. (2003). Effects of novelty stress on neuroendocrine activities and running performance in thoroughbred horses. J. Neuroendocrinol., 15: 638-648.
Henderson A.J. (2007). Don’t fence me in: managing psychological well being for elite performance horses. J. Appl. Anim. Welfare Sci., 10: 309-329.
Irvine C.H.G., Alexander S.L. (1996). Update on equine endocrinology. Proc. 11th International Conference of Racing Analysts and Veterinarians, pp. 86-91.
Janczarek I., Kędzierski W. (2011 a). Emotional response to novelty and to expectation of novelty in young race horses. J. Equine Vet. Sci., 31: 549-554.
Janczarek I., Kędzierski W. (2011 b). Emotional response of young race horses toatransfer fromafamiliar to an unfamiliar environment. Anim. Sci. Pap. Rep., 29: 205-212.
Janczarek I., Kędzierski W. (2011 c). Is itagood idea to train fillies and colts separately? J. Appl. Anim. Welfare Sci., 14: 211-219.
Jansen F., Vander Krogt J., Van Loon K., Avezzu V., Guarino M., Quanten S., Berckmans D. (2009). Online detection of an emotional response ofahorse during physical activity. Vet. J., 181: 38-42.
Kutte J. (2012). Humans, horses, and hybrids: On rights, welfare, and masculinity in equestrian sports. Malmöhögskola, Idrottsvetenskap, Scandinavian Sport Studies Forum, pp. 49-69.
Landers T.A. (2006). Professional care of the racehorse: Aguide to grooming, feeding, and handling the equine athlete. Eclipse Press.
Leiner L., Fendt M. (2011). Behavioural fear and heart rate responses of horses after exposure to novel objects: Effects of habituation. Appl. Anim. Behav. Sci., 131: 104-109.
Little R., Stroup W., Freund R. (2002). SASfor Linear Models. SAS Institute Inc., USA, pp. 269-272.
Mac Taggart G., Mc Greevy P., Waran N., Phillips C. (2010). Development ofathoroughbred racehorse welfare educational index and associated programme for youth groups. Proc. 3rd Australasian Equine Science Symposium, 3-5.06.2010, 66.
Mills P.C., Smith N.C., Casas I., Harris P., Harris R.C., Marlin D.J. (1996). Effects of exercise intensity and environmental stress on indices of oxidative stress and iron homeostasis during exercise in the horse. Europ. J. Appl. Physiol. O., 74: 60-66.
Mircean M., Giurgiu G., Mircean V., Zinveliu E. (2008). Serum cortisol variation of sport horses in relation with the level of training and effort intensity. Bull. USAMV-CN, Vet. Med., 64: 488-492.
Rietmann T.R., Stuart A.E., Bernasconi P., Stauffacher M., Auer J.A., Weish- aupt M.A. (2004). Assessment of mental stress in warmblood horses: heart rate variability in comparison to heart rate and selected behavioural parameters. Appl. Anim. Behav. Sci., 88: 121-136.
Schmidt A., Biau S., Mostl E., Becker-Brick M., Morillon B., Aurich J., Fau- re J.M., Aurich C. (2010 a). Changes in cortisol release and heart rate variability in sport horses during long-distance road transport. Domest. Anim. Endocrinol., 38: 179-189.
Schmidt A., Möstl E., Wehnert C., Aurich J., Muller J., Aurich C. (2010 b). Cortisol release and heart rate variability in horses during road transport. Horm. Behav., 57: 209-215.
Shanahan S. (2003). Trailer loading stress in horses: behavioral and physiological effects of nonaversive training (TTEAM). J. Appl. Anim. Welfare Sci., 6: 236-274.
Stull C.I., Rodiek A.V. (2000). Effect of cross-tying horses during 24hof road transport. Equine Vet. J., 34: 550-555.
Vatistas N.J., Sifferman R.L., Holste J., Cox J.L., Pinalto G., Schultz K.T. (1999). Induction and maintenance of gastric ulceration in horses in simulated race training. Equine Vet. J., 31: 40-44.
Visser E.K.,van Reenen C.G.,vander Werf J.T., Schilder M.B., Knaap J.H., Barneveld A., Blokhuis H.J. (2002). Heart rate and heart rate variability duringanovel object test andahandling test in young horses. Physiol. Behav., 76: 289-296.
Waters A.J., Nicol C.J., French N.P. (2002). Factors influencing the development of stereotypic and redirected behaviours in young horses: findings ofafour year prospective epidemiological study. Equine Vet. J., 34: 572-579.
Wehnert C., Schmidt A., Mostl E., Aurich J., Muller J., Aurich C. (2008). Heart rate and cortisol release in horses during road transport of 1, 3.5 and 8 hours duration. Proc. International Equine Science Meeting, Regensburg, Germany, 44.
Werhahn H., Hessel E., Vanden Weghe H. (2012). Effects of free exercise on the behaviour in the stable, the behaviour during training and the degree of stress. J. Equine Vet. Sci., 32: 22-31.
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