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Advisor(s)
Abstract(s)
O presente trabalho teve como principal objetivo avaliar a influência do peso do
cavaleiro na locomoção do cavalo no trote, através da análise de assimetrias
locomotoras detetadas por um sistema baseado em visão computacional – SLEIP®. A
questão de investigação prende-se com a crescente preocupação em torno do bem-
estar dos equinos. Para tal, foram realizados ensaios com quatro cavalos de escola,
avaliados em piso duro e piso mole, em três condições distintas: conduzidos à mão, e
montados por um cavaleiro de 71,5 kg e por outro de 90 kg. A recolha de dados incluiu
filmagens dos animais a trote e posterior análise automática dos vídeos pela aplicação
SLEIP, que quantificou assimetrias nos membros anteriores e posteriores nas fases de
impacto e impulsão. Adicionalmente, aplicou-se uma escala de desconforto baseada num
etograma de dor para cavalos montados. Os resultados demonstraram a influência do
peso do cavaleiro nos padrões de assimetria locomotora, mas também da distribuição
desse peso pelas diagonais a trote e do tipo de piso, tanto nas assimetrias primárias
como nas assimetrias compensatórias. Embora os valores situados no rácio aceitável de
peso cavaleiro: cavalo (10-20%) possam minimizar os efeitos negativos, a técnica e
experiência do cavaleiro também desempenham um papel relevante na compensação
das assimetrias. Em alguns casos, a presença do cavaleiro reduziu a expressão de
claudicações subtis. As alterações observadas indicam que a adição de peso pode
exacerbar assimetrias já existentes ou revelar compensações biomecânicas, o que
reforça a necessidade de considerar o binómio cavalo-cavaleiro na avaliação da
locomoção. Conclui-se que ferramentas objetivas como o SLEIP, aliadas à análise
comportamental, são fundamentais para uma gestão mais rigorosa e ética do treino e do
bem-estar dos cavalos.
The present study aimed primarily to assess the influence of rider weight on horse locomotion at the trot, through the analysis of locomotor asymmetries detected by a computer vision-based system – SLEIP®. The research question stems from the growing concern around equine welfare. To this end, tests were conducted using four school horses, evaluated on both hard and soft surfaces under three distinct conditions: led in hand, ridden by a 71.5 kg rider, and ridden by a 90 kg rider. Data collection included video recordings of the horses trotting, followed by automatic analysis of the footage using the SLEIP application, which quantified asymmetries in the forelimbs and hindlimbs during impact and push-off phases. Additionally, a discomfort scale based on a ridden- horse pain ethogram was applied. The results demonstrated the influence of rider weight on locomotor asymmetry patterns, as well as the effect of how that weight is distributed across the diagonal pairs during trot and the type of surface, in both primary and compensatory asymmetries. Although values within the acceptable rider-to-horse weight ratio (10–20%) may minimize negative effects, rider technique and experience also play an important role in compensating for asymmetries. In some cases, the rider’s presence reduced the expression of subtle lameness. The observed changes suggest that adding weight may exacerbate existing asymmetries or reveal biomechanical compensations, reinforcing the need to consider the horse–rider combination when assessing locomotion. It is concluded that objective tools such as SLEIP, combined with behavioural analysis, are essential for more rigorous and ethical management of horse training and welfare.
The present study aimed primarily to assess the influence of rider weight on horse locomotion at the trot, through the analysis of locomotor asymmetries detected by a computer vision-based system – SLEIP®. The research question stems from the growing concern around equine welfare. To this end, tests were conducted using four school horses, evaluated on both hard and soft surfaces under three distinct conditions: led in hand, ridden by a 71.5 kg rider, and ridden by a 90 kg rider. Data collection included video recordings of the horses trotting, followed by automatic analysis of the footage using the SLEIP application, which quantified asymmetries in the forelimbs and hindlimbs during impact and push-off phases. Additionally, a discomfort scale based on a ridden- horse pain ethogram was applied. The results demonstrated the influence of rider weight on locomotor asymmetry patterns, as well as the effect of how that weight is distributed across the diagonal pairs during trot and the type of surface, in both primary and compensatory asymmetries. Although values within the acceptable rider-to-horse weight ratio (10–20%) may minimize negative effects, rider technique and experience also play an important role in compensating for asymmetries. In some cases, the rider’s presence reduced the expression of subtle lameness. The observed changes suggest that adding weight may exacerbate existing asymmetries or reveal biomechanical compensations, reinforcing the need to consider the horse–rider combination when assessing locomotion. It is concluded that objective tools such as SLEIP, combined with behavioural analysis, are essential for more rigorous and ethical management of horse training and welfare.
Description
Keywords
locomoção do cavalo assimetria SLEIP bem-estar do cavalo Claudicação horse locomotion asymmetry horse welfare lameness
Pedagogical Context
Citation
Costa, M.I.L.M.(2025).USO DE UM SISTEMA DE ANÁLISE DE CLAUDICAÇÃO EM EQUINOS ASSENTE EM VISÃO COMPUTACIONAL NA AVALIAÇÃO DAS ASSIMETRIAS LOCOMOTORAS E DO EFEITO DO PESO DO CAVALEIRO. Escola Superior de Biociências. Dissertação de Licenciatura. Repositório
Publisher
Escola Superior de Biociências de Elvas