Jean Luc Cornille

Jean Luc Cornille Jean Luc Cornille Maitre (Master)from the Cadre Noir de Saumuring is a FEI-level trainer, instructo

05/31/2026
Superbe Article by Elizabeth Uhl. DVM, PhD, DACVP. The approach is abundantly used and taught in the Science of Motion's...
05/18/2026

Superbe Article by Elizabeth Uhl. DVM, PhD, DACVP. The approach is abundantly used and taught in the Science of Motion's courses

Thoughts on Dynamic Synchrony vs Mechanical Technique

Horses are our dance partners, in the sense that our goal is to make our combined movements easy, beautiful, efficient, effective and healthy. To do this mechanical technique and dynamic synchrony of forces must be perfected. While both are important, they are very different. Mechanical technique is quantifiable and reductionist. It involves postural things such as position of the head, neck and back, placement of the legs, angles of joints etc. that can be measured. It is what equitation has traditionally been based upon. In contrast, dynamic synchrony is about the qualitative features that make movement beautiful, powerful and efficient. Easily recognizable, both by sight and feeling – even by non-horse people, the qualitative features of movement, for which biotensegrity provides an explanation, include the ease or floating like quality of how movements are connected together as well as the feeling of easily directed and controlled power. Traditional biomechanical considerations are focused on the geometry of motion (i.e.: kinematics) but not the forces that create movement, which are very hard to measure. While such a focus can identify kinematic conditions that enhance dynamic synchrony (i.e.: slowing the motion and improving balance), too much emphasis on the geometry of movement can inhibit the development of dynamic synchronization, which requires the focus be on how the forces that create movement are being managed.
It is mastery of these forces (dynamic synchrony) that sets great dancers and riders apart from others who may be technically correct but lack the ‘magic’. Dynamic synchrony is thus the gold standard that directs technique, as it determines which postures/exercises will enhance force management and which are inhibiting and likely damaging. It is a fundamental mistake to think that the beauty of dynamic synchrony can be created by simply trying to fit a horse and rider to a set of standardized kinematic, and mechanically reductionist criteria. The reality is the opposite is true: forcing such a one-size-fits-all standard will cause the horse, and potentially also the rider, to break down. The reason is obvious: horses and riders are not machines; they are highly individualized living organisms that move and interact with each other and the environment through the unique ways forces are generated, managed and interact.
Practically this means that which exercises and movements should be used is determined by whether they improve or inhibit the dynamic synchrony between a specific horse and trainer. For example: as Jean Luc has pointed out, the usefulness of shoulder-in is determined, not by fitting a horse to an arbitrary geometrical angle, but whether the exercise enhances or inhibits ease of movement in real time. Similarly, how long a horse should stay in a gait or how much a horse should bend its thoracic spine is determined in real time by whether the movement gets easier or harder. Determining when to continue versus stop doing an exercise is challenging, as an exercise that does enhance dynamic synchrony can be difficult and thus resisted when first applied. However, if the horse (or trainer) is becoming tense and stressed to the point that increasing as opposed to decreasing force is being used to do the movement it is time to stop and try something else. A focus on enhancing dynamic synchrony, the conditions of which are always changing, also makes it easier to understand why an exercise is useful one day but not the next. In contrast a strict kinematic perspective will lead to a trainer clinging to an exercise because of its theoretical benefits even if the horse indicates doing the exercise is generating painful and damaging forces. Dynamic synchrony also puts as much, if not more emphasis, on how the rider is managing forces, as opposed to what the horse is doing ‘wrong’. At Jean Luc’s last clinic, he focused on the rider’s dynamic synchrony, and the result was the horses’ issues were corrected as well if not better than when the emphasis was on what the horse was doing. This should not be a surprise as the ultimate connection between a horse and a rider is a dynamically synchronized dance between two equal partners, not a one-way forced obedience test.
Focusing only on mechanical technique will inhibit dynamic synchrony. In contrast, an emphasis on dynamic synchrony will identify the most effective exercises for a specific horse and rider in real time.
So how do you tell if you are too focused on mechanical technique versus dynamic synchrony? A few questions I have found helpful: 1) Am I focused too much on correcting the horse and judging the success of my correction by a reductionist metric (i.e.: angle of the body, position of a leg)? 2) How am I reacting to the forces generated by the horse’s movement - am I statically resisting them or dynamically directing them? Am I overreacting to them? 3) Most importantly how much attention am I giving to how forces are being managed in my body? Repeatedly, I have found that if I first dynamically synchronize the forces to produce the quality of movement I want in myself, the less I have to correct my horses as they will immediately match me.
Finally, just as dancers can be dynamically synchronized while doing very different movements, being in dynamic synchrony with a horse does not require that we match the geometry of their gait - which is a physical impossibility given we have 2 legs and they have 4. While we can geometrically match the movement of their front legs at the walk and a slow trot, it is not essential to being dynamically connected. In the picture of me lunging Bentley, we are dynamically in sync, but the geometry of our movements is very different - he is doing a flying change. See less

05/04/2026

Each horse is different, and while in most instances SIJ problem can be rehabilitated, it is necessary to identify the body dysfunction that stresses the ligaments that stabilize the SIJ. With proper direction and diligent work, the rider is more likely to correct the body dysfunction. Our rehabilitation starts with an analysis of the horse's body dysfunction, and a gymnastic program to recreate proper body coordination. There is no miracle or quick fix. It takes time and efficient work to restore effective soundness. Jean Luc

04/30/2026

Chazot and Jean Luc Thoughts (older post but stil relevant)
(Jean Luc). While a great defender of the French school, General Decarpentry knew that a school of thought is a limitation, an obstacle to something bigger. As president of the only International dressage jury in 1949, Decarpentry compared skilled riders from different schools. He dreamed about a broader equestrian art and art without frontier, but competition is not about the horse and competition divided. The General was aware of the many blanks in the different schools of thought. He attributed the ability to fill up the blanks to the riders’ skill. “The officer who decides to prepare a horse for international dressage tests is going beyond the limits of his equestrian education.” (Academic Equitation, 1949). The scientific knowledge was elementary, and he could not have understood that the ones who filled up the blanks were, indeed, the horses.

(Chazot) Willingness is part of our Umwelt, but also part of our Umwelt is our will to survive. The combination has led to the most dramatic misunderstanding between humans and equines. Humans have approached us through their myopic lens of self-importance. We are tall and powerful, and by fear, humans resorted to submission. We were willing to do what humans asked but protecting our actual muscle imbalance or other issues. With the mindset on submission. Humans interpreted our errors or protective reflexes, as unwillingness, and instead of analyzing our difficulties and providing solutions, humans reinforced submission. Some of us revolted, as I did, but it was hell until you came and rescued me. Many horses accept slavery as a survival choice.

(Jean Luc) Another reason for the deep-misunderstanding between humans and equines is our naïve belief that you naturally have the solution. Decarpentry defined the aim of academic equitation as restoring to the mounted horse the gracefulness of attitudes and movements which he possessed when he was free. There is a fundamental difference between a move that a horse executes during play and the stylized version of the move required in the show ring while carrying a rider. The natural reflexes are ill-adapted. The evolution of knowledge also exposes more efficient use of your physique. Impact forces, for instance, are traditionally absorbed by eccentric contraction. Propulsive forces are created by concentric contraction. Science has demonstrated that focusing on the cadence and the balance it was possible and more energy-efficient for a horse to use for the propulsion, the elastic energy produced by the eccentric contraction. “The ability of the muscle-tendon units to recover elastic strain energy is apparently energetically so advantageous that the most economical stride frequency in the running may be set by this key component alone.” (Paul C. LaStayo, PT, Ph.D. and all)

(Chazot) When you taught me this technique at the lunge line and riding, I was surprise how easy and comfortable the trot was when I let the elastic energy do the job. It was a valuable lesson. I should say lessons as it demanded practice for me to figure the balance and the cadence where I could optimize storage and reuse of elastic energy. Mentally it was even more important. You showed me that it was a more efficient and easier way. This entered my mind, and I started to look for greater ease and efficiency.

(Jean Luc) I did not teach you how to use CLICK TO READ ON https://www.scienceofmotion.com/chazot_and_jean_luc_thoughts.html

04/27/2026
Remember the Thank YouI have been thinking about the feelings a thank you generates whether I am the recipient or the gi...
04/27/2026

Remember the Thank You
I have been thinking about the feelings a thank you generates whether I am the recipient or the giver. For example, it makes me smile every time Jean Luc thanks me for counterbalancing the stirrup as he mounts Pascalina. Likewise, seeing people smile when I thank them for a service rather than simply expect them to provide it, I feel good.
When I started thanking my horses, I became aware of a subtle but important difference between expressing praise versus gratitude. In general, praise goes with meeting expectations while a thank you acknowledges willingness in the recipient to do something for you. Thank you elevates the receiver: “Thank you, for choosing to work with me.” It shows appreciation in a way that is different from praise: “You did a good job; you met my expectations.” I think this gets at what Jean Luc means when he says horses are willing and that problems often result from a focus on obedience (i.e.: on making them meet our expectations). Horses are very willing to work with us, but if the expectations are too high and they physically or mentally cannot meet them, they rightfully push back. Now I am very aware that often when they do push back, the problem was with my expectations, but in the past, I used to double down and demand obedience rather than consider whether the horse could do, or was adequately prepared to do, what I was asking. I know better now thanks to Jean Luc, but I still cringe when I think of the mistakes I made in the past. Today I often start my rides mentally thanking the horses I have worked with for what they tried to teach me and apologizing for being so slow to learn. I use it as a reminder to listen to what my horses are telling me today and adjust my expectations for the work appropriately. I thank them - regardless of how the session went, as that they will work with us at all is truly amazing. When something was wrong with the session, I add assurances that I got their message that I need to critically assess my thinking/approach - after all they have not read the training manuals and do not know how they are expected to respond. Given how sensitive horses are, I am sure they also feel the positive effects of a thank you, but even if they do not, it helps remind me that our relationship should be a partnership based upon willingness and gratitude rather than one of master and servant.
Elizabeth Uhl. DVM, PhD, DACVP

Step into the future of horse training with IHTC 2! 🐴💫 Unlock better movement and rehab!    https://conta.cc/3QbwTN7
04/23/2026

Step into the future of horse training with IHTC 2! 🐴💫 Unlock better movement and rehab!
https://conta.cc/3QbwTN7

Email from Science Of Motion Join Industry Experts Jean Luc Cornille and Dr. Uhl for IHTC 2 - Register Today! In-Hand Dressage 2-IHTC 2 2026 IHTC 2 — The Next Evolution in Equine Biomechanics and Trai

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