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A forage-only diet and reduced high intensity training distance in standardbred horses

growth, health and performance

Ringmark, Sara (2014). A forage-only diet and reduced high intensity training distance in standardbred horses. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2014:80
ISBN 978-91-576-8108-9
eISBN 978-91-576-8109-6
[Doctoral thesis]

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This thesis examined growth, health and performance in sixteen 1.5-3-year-old Standardbred horses fed a forage-only diet and trained to race as 3-year-olds in either a control training programme (C-group) or a training programme in which the high intensity training distance was reduced by 30% (R-group). Body condition, height, body weight, exercise heart rate (HR), veterinary treatments, health status, locomotion symmetry and days lost to training were recorded continuously. Lactate, haematocrit and HR response to a standardised exercise were measured, as was lactate threshold (VLa4). A muscle biopsy was taken yearly for each horse and analysed for glycogen content. A complementary study examined the effect of forage crude protein (CP) content on insulin response to feeding in six adult, conditioned Standardbred horses.

All horses in the main study passed a preparation race, 94% qualified for races and 56% raced. Experimental horses raced to a similar extent and passed preparation and qualification races to a higher extent than their older siblings and horses of the same cohort. There was no difference between training groups with respect to race participation, post-exercise blood lactate or VLa4. R-group horses showed less pronounced cardiovascular response to training than C-group horses. There was no difference between the groups in clinical health examinations or locomotion asymmetry but R-group horses lost fewer days to training. Locomotion asymmetry in all horses increased after introduction of new speed training and high asymmetry was associated with later qualification for races. No cases of feed-related heath disorders occurred during normal management. The horses grew least as well as reported in the literature and body condition was maintained at a moderate level. Resting muscle glycogen content was within the range reported previously for concentrate-fed horses. In the study on adult horses, the CP content and the content of water-soluble carbohydrates (WSC) together explained more of the variation in insulin response to feeding than WSC content alone. It was concluded that a forage-only diet and reduced training distance can benefit health and poses no limitation to race participation, growth, body condition or muscle glycogen content in 3-year-old Standardbred horses.

Authors/Creators:Ringmark, Sara
Title:A forage-only diet and reduced high intensity training distance in standardbred horses
Subtitle:growth, health and performance
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :October 2014
Number of Pages:99
I.Ringmark, S., Roepstorff, L., Essén-Gustavsson, B., Revold, T., Lindholm, A., Hedenström, U., Rundgren, M., Ögren, G. and Jansson, A. (2013). Growth, training response and health in Standardbred yearlings fed a forage-only diet. Animal 7(5), 746-753.
II.Ringmark, S., Lindholm, A., Hedenström, U., Lindinger, M., Dahlborn, K., Kvart, C. and Jansson, A. Effects of high intensity training distance on VLa4 and cardiovascular response of 2-3 year old Standardbred horses. (Submitted)
III.Ringmark, S., Jansson, A., Lindholm, A., Hedenström, U. and Roepstorff, L. A 2.5 year study on health and locomotion symmetry in young Standardbred horses fed a forage-only diet and subjected to two levels of high intensity training distance. (Submitted)
IV.Ringmark, S., Hedenström, U., Lindholm, A., Revold, T., Roepstorff, L. and Jansson, A. Effects of high intensity training distance on race participation, muscle glycogen and body condition in young Standardbred horses fed a forage-only diet. (Manuscript)
V.Ringmark, S. and Jansson, A. (2013). Insulin response to feeding forage with varying crude protein and amino acid content in horses at rest and after exercise. Comparative Exercise Physiology 9(3-4), 209-217.
Place of Publication:Uppsala
Publisher:Institutionen för husdjurens utfodring och vård, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-8108-9
ISBN for electronic version:978-91-576-8109-6
Additional Information:Errata bifogas som PDF-fil
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L02 Animal feeding
L Animal production > L51 Animal physiology - Nutrition
Q Food science > Q54 Feed composition
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Agrovoc terms:racehorses, foals, roughage, silage, nutritional requirements, animal training, animal performance, locomotion, body condition, animal health
Keywords:forage-only diet, training distance, young horses, performance, health
Permanent URL:
ID Code:11567
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Nutrition and Management
External funders:ATG (Aktiebolaget Trav och Galopp) and Dow Chemicals and Hästnäringens nationella stiftelse and Svensk Travsport and Trioplast AB and Wången AB
Deposited By: Sara Ringmark
Deposited On:10 Oct 2014 05:33
Metadata Last Modified:02 Dec 2014 11:08

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