Equine locomotion: 2. The analysis of coordination between limbs of trotting standardbreds.

This study analyses the coordination between the limbs of racing standard bred horses during trotting through high-speed cinematographic analysis, exploring the regularity, symmetry and variations in their gait.

Research Methodology

• The researchers used high-speed cinematography to digitally capture and analyse the motion of trotting standardbred horses.
• The study was conducted on 30 clinically sound horses, all of them captured running at racing speed of 12.0 meters per second, an equivalent of 1:23.6 min/km.

Observations and Findings

• The findings indicated that the racing trot of the group of horses was fairly regular and symmetric, showing consistency in their locomotion pattern.
• Analysis across the entire group of horses found a coefficient of variation ranging from 8 per cent to 21 per cent. The range reflects the variability depending on the particular characteristic being studied.
• The variations noted within individual animals were approximately 60 per cent less than those observed across the entire group, suggesting that individual horses have more consistency in their movement patterns than might be noted from comparing different horses’ movements.
• The most stable attributes were the duration and length of the step. These were less variable, indicating that trotting standardbreds maintain a rather consistent step pattern in terms of speed and stride length.

Gait Asymmetries and Unusual Gaits

• The study documents that some horses displayed noticeable gait asymmetries. The researchers considered possible causes of these asymmetries, although these causes are not detailed in the abstract.
• Few trotters evolved a gait transition that could not be classified as a standard trot. The cause and implications of this observation are also not elaborated in the abstract.

This research provides valuable insights into the consistency and variation of trotting locomotion in standardbred horses, contributing to our understanding of equine biomechanics and potentially informing areas such as horse training, performance assessment and veterinary care.