Hoof ground interaction: when biomechanical stimuli challenge the tissues of the distal limb.

This research article discusses the impact of hoof ground interaction on the locomotor system of equine athletes, further highlighting the essential role of regular monitoring, maintaining hoof and distal limb health, and conformational and balance considerations.

Significance of Biomechanical Stimuli

• The research focuses on understanding how biomechanical signals produced by hoof ground interaction might lead to physiological or pathological tissue adaptations in horses. These biomechanical stimuli such as forces, pressures, movements, accelerations, and strains can result in physiological maturation, functional adaptation, or cause irreparable damage if not properly managed.
• The distal limb and hoof are often the most critical feature in a performance horse’s wellbeing. Therefore the study underscores the importance of research in this area to ensure the overall health status of the equine’s locomotor system is optimized.

Hoof Conformation and Balance

• The researchers detail the importance of the external and internal structures of a horse’s hoof. The form or conformation of these structures plays a pivotal role in influencing hoof and distal limb health, as well as the overall performance of the horse.
• Notably, the hoof’s balance and conformation can be influenced by a variety of factors including trimming, shoeing, and the ground surface. The study also notes hereditary, nutritional, and environmental factors can similarly impact the development of the hoof’s conformation during growth.
• Early intervention, such as trimming of the foal’s hoof from an early age (about 4 weeks), is recommended for optimal conformation. However, if not correctly utilized, this practice could lead to other clinical problems.

The Mature Horse

• In mature horses, the study has found there to be a significant relationship between hoof form and distal limb conformation. An ideal hoof balance and conformation can alleviate undue forces being applied to key structures within the hoof, such as the navicular bone.
• The researchers note the significance of hoof growth during the shoeing interval as it directly impacts the dorsal hoof wall angle and toe length. This in turn influences the center of pressure towards the heel. Therefore, a significantly increased moment of force can lead to increased tension in the deep digital flexor tendon (DDFT) and pressure on the navicular bursa.