Preliminary investigation of maximal fetlock extension during jump landing phase on two arena surfaces; two dimensional motion analysis

Abstract

Surface type has a recognised effect on the biomechanics of a horse, yet suitability of surfaces to discipline has not been fully substantiated. Ideal exercise surface conditions should be a balance of energy absorption to minimise concussion and energy return to aid performance (Barrey et al., 1999) and these conditions vary according to type of work. Greater force on a particular limb will increase the probability of injury, especially in sports that are repetitive in nature, such as show jumping. It is well known that high impact forces occur during the landing phase of jumping (Meershoek et al., 2001); investigation of this phase is therefore integral to understanding the effect that surface has on horses that jump. Maximal fetlock extension may be useful as an indicator of magnitude of ground reaction forces (Clayton, 1997). This means that in-field studies can be used to measure maximal fetlock extension as a guide to forces placed on the limb.