Holmstrom et al. (1990) highlighted that conformation is regarded as indicative of performance and soundness. However little research has been devoted to confirming the relationship between conformational characteristics and performance. Today most conformational assessment is based on a subjective approach (Holmstrom et al 1990). Several authors have stressed the most important part of the ridden horses conformation are its hind limbs (Holmstrom et al 1990). Length between tuber coxae and tuber calcanei (point of hip to point of hock) is regarded by assessor and trainers as an important reflection of the power generated within the hind limb. The belief is that, the longer this length the greater the power generated and potentially the higher level of performance attained. However there is little scientific evidence to verify this. The stated null hypothesis is tuber coxae to tuber calcanei length does not differ significantly in four groups of event horses defined by level of performance.