Publication: Comparison of the longissimus dorsi muscle tone in Thoroughbred racehorses before and after training
Issued Date
2016
Resource Type
Language
eng
ISSN
1906-2257
Rights
Mahidol University
Rights Holder(s)
Faculty of Veterinary Science Mahidol University
Bibliographic Citation
Journal of Applied Animal Science. Vol.9, No.3 (2016), 37-49
Suggested Citation
Pichet Jewmongkonchai, Arunothai Muangma, Pattama Ritruechai Comparison of the longissimus dorsi muscle tone in Thoroughbred racehorses before and after training. Journal of Applied Animal Science. Vol.9, No.3 (2016), 37-49. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/15257
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Title
Comparison of the longissimus dorsi muscle tone in Thoroughbred racehorses before and after training
Alternative Title(s)
การศึกษาเปรียบเทียบแรงตึงของกล้ามเนื้อ longissimus dorsi ในม้ากลุ่มโทโรเบรดก่อนและหลังการฝึกซ้อม
Abstract
The longissimus dorsi is the largest back muscle of the horse and has the potential to contribute movement
to the horse's back. Damage to the longissimus dorsi is very common to cause back injuries, which is also a
major cause of poor performance and gait abnormalities in horses. The muscle indenter is a tool that allows
measuring the stiffness of the back muscles. We hypothesized that the longissimus dorsi muscle tone after
training would be stiffer than at rest. One sound mare and three gelding Thoroughbred racehorses were used
in this study. The muscle tone was measured using a muscle indenter along both sides of the T14, T16, T18 and
L2 longissimus dorsi muscle. Blood sample were collected to measure the blood lactate concentration before
and after training. Heart rate was measured at rest and at 0, 5, 10, 15 and 20 minutes after training. We found
a significant increase in muscle tone after training at T14, T16 and T18. The blood lactate concentration of
studied horses significantly increased after training, although the values were still within the normal range.
The recovery heart rates for all horses are tended to decrease (< 70 bpm) after 5 minutes of stopping exercise.
We confirmed that the longissimus dorsi is a key muscle in horse movement that can be sensitive to relatively
small training sessions; that is why this muscle is prone to get injured. Generally, the muscle intender was a
successful tool of objectively measuring this muscle tone.
