However, blood is returned with difficulty from the lower part, because of the absence of muscle and its massaging effect. This can be seen in the swelling of the soft tissue, immediately above the hoof, which occurs when the horse is confined, for any length of time. Also the slow return of blood is associated with retarded healing of wounds to the extremity. A similar situation holds as in the fore limb. Efficiency of the Heart - to improve Providing the heart is healthy, a horse with a larger heart performs better than one of similar body size but with a smaller heart.
Exercise causes growth of the heart.
The tendon of the deep flexor muscle plays over it. It is a particularly troublesome and persistent condition, causing lameness. Prolonged trotting over a hard surface is a possible cause. This may occur in a race horse, after a race. Traditional treatment can include antihistamines or cautary of enlarged blood vessels at the back of the nasal cavity.