Treadmill training induced changes to some kinematic variables measured at the canter in Thoroughbred fillies

Abstract

SummarySix Thoroughbred fillies undertook a high intensity treadmill exercise programme over an 8 week period. Kinematic parameters of the left front limb were measured using the MacReflex system as the horses were cantered on a left lead. Measurements were made as the horses performed a standardised stepwise exercise test on the treadmill (speeds 7‐11m/s, 0% slope.) The aim was to study objectively the effects of training on the equine locomotor apparatus and to test the hypothesis that horses would display mechanical adaptation to aspects of their gait, as a result of treadmill training. The variables measured were stride length; stride frequency; stance time, as a percentage of stride time; relative movements of limb joints in the X (horizontal) and Y (vertical) directions; angles about the carpus and fetlock joints; and total ranges of motion of the carpus and fetlock joint. Statistical significance was chosen at the level p<0.05. Training induced significant changes to several aspects of the stride cycle. Percentage stance times were reduced across all speeds and significant changes were observed in the movements of the limb joints resulting in increased vertical hoof lift. Significant increases were also seen in the carpal and fetlock joint ranges of motion and also in carpal joint angles. The results suggest that the training regime employed produced significant alteration in stride kinematics at the canter.