Explanation of the video:
I LIKE THE WAY YOU MOVE. . . THE COMPLEXITY OF MOVEMENT IN THE HORSE
(A partial/superficial explanation of what is going on inside the foot in this video)
I like the way you move
How complicated is just the movement of the foot alone!
The foot is like a passive spring mass system.
“The mass is the mass of the limb itself. The force is the downward force of the horse’s body multiplied by the acceleration and gravity” (1)
The alignment and placement of the pastern and hoof is carried out with virtually no assistance with any muscular activity.
The forelimbs support more weight than the hind limbs.
During flexion of the fetlock and the hoof, most of the movement is in the fetlock. The least amount of movement is in the pastern joint; and movement in the coffin joint is in between these two.
During the first half of the stride as the fetlock goes downwards, the suspensory ligament tightens first, followed by the superficial flexor tendon and then the deep digital flexor tendon.
The fetlock rotates on itself faster than the coffin bone (also known as pedal bone) and rotates during the first part of the stride immediately after impact with the ground.
During the second half of the stride, the suspensory ligament shortens first which leads to the coffin bone rotating. This is followed by the superficial flexor tendon shortening, which causes the pastern and fetlock to rotate. The Deep flexor tendon then shortens causing again the fetlock rotation.
The Sesamoid bones are a part of the suspensory apparatus, and they serve to increase the surface area of the fetlock area of the fetlock joint. They also receive the compressive forces exerted by the cannon bone. The presence of the sesamoid bones prevent displacement and any changes in flexor tendon speed.
THE ‘FLICK’ OF THE TOE (Can be seen clearly in this video – especially with the Clydesdale):
The flick of the toe at the end of the stride is caused by the deep flexor tendon’s pull on the coffin bone, when all the load is off that leg.
The reason one can learn from this video is because you can see why you need to think about how to train and ride a horse with care- taking into account how the ligaments and bones function. Keep everything in alignment as much as possible, and let the horse’s body do its job, even with the extra weight it has to carry or pull. Speed, tight turns, jumping, fast stops etc. need to be performed carefully if you are going to have a kinematically sound horse.
The love of tradition in how horses were trained even 10 years ago needs to be updated to align with new medical and scientific knowledge of the functional anatomy of the horse. Old thinking has to be weighted with: “Well how does the horse’s body really function? And how can we incorporate that knowledge in training our horses to stay sound and healthy with a long future” – there is no need for second guessing with the information available. Now – that is common sense horsemanship! One can see straight away with this video alone, that making a horse go at speed around a round pen would definitely upset the kinematics of the leg and hoof. One incorrect stride after another and another and another will lead to compromised tissues, damage and eventually lameness. Imagine the concussive forces on the front limb when the horse is being pulled around in ‘doubling’ or a ‘one rein stop’ even in a walk?
*** Original video published by ‘OntrackEquine’Software*** website: http://ontrackequine.com/
Ref: James R Rooney D.V.M – articles, videos, books and (1) On the