The first is muscle-based movement. In this modality, the muscles are directly moving the bones and therefore directly moving the body. The muscles remain active through most of the stride. The movement is driven by contraction. Horses moving this way often look strong, but the movement feels heavy, non-elastic, lacking rhythm and grace. They become dull in the contact, resistant in the back, difficult to unite from hind to front. The body feels fragmented, as if each part is working for itself rather than as a coordinated whole.
The second modality is tendon-based movement. In this modality, the muscles do not act as the primary engines. They provide short, precise tension to load the tendons and ligaments. The tendons then store energy and release it. The active element is the elastic system. Energy is reused rather than recreated from scratch in every stride. Horses moving in this way feel light, expressive, responsive. They seem to have remarkable stamina because they are not starting from zero with each movement; they are recycling energy through the axial ligament chain.
These two modalities are not stages on a spectrum. They are fundamentally different patterns of use.
If you train a horse in muscle-based movement, you are reinforcing muscle-based movement. The nervous system adapts to contraction-dominant patterns. The more you practice it, the more the horse relies on muscles to move and stabilize. You do not gradually develop tendon-based capacity by strengthening muscle-based work. You move further into the muscular pattern.
This is why spending years developing muscle-based movement is not neutral. It is counterproductive. It does not build the elastic ability required for high-level performance. In fact, it makes it harder to access.
In every equestrian discipline — dressage, jumping, eventing — what we ultimately want is tendon-based movement. A jump is a pure elastic action. Muscles alone are too slow and cannot generate the acceleration required; the horse must store and release energy through its tendons. The same applies to correct piaffe and passage. True expression and lightness come from elastic recoil, not from prolonged contraction.
If you are fortunate enough to own a horse that naturally prefers tendon-based movement and you do not suppress it, you may succeed without understanding why. But many horses default toward muscular patterns. Without conscious training toward elasticity, they will not develop tendon-based movement on their own, and with age and training will become stiffer, heavier, grumpier and gradually slower and less engaged.
Continuing to train in muscle-based modality while hoping for elastic results is a waste of time. It reinforces the wrong system and gradually makes the horse heavier, more tense, and more limited. Over time, this exposes the horse to fatigue, imbalance, and eventually injury.
The only way to truly develop the horse is to deliberately train in tendon-based movement.
The good news is that for nearly every horse this transition is possible. When it happens, the change is unmistakable. Expression improves. Rhythm stabilizes. The horse becomes lighter yet more powerful. In jumping, the horse jumps higher. In dressage, movements gain suspension and clarity, all gaits improve dramatically. Stamina increases because energy is being reused rather than wasted.
Understanding tendon-based movement — and knowing how to apply it in everyday training — is the real beginning of development.
Remaining in muscle-based movement is not just inefficient. It gradually makes the horse worse.
Switching to tendon-based movement is the only conscious and constructive way forward.