Why Horses Come Back Sound… and Then Go Lame Again

Why Horses Come Back Sound… and Then Go Lame Again

Few things are more discouraging than watching a horse return to work after a soft tissue injury, moving well and feeling strong, only to show discomfort again a few weeks later. It often feels sudden, but reinjury rarely happens in the moment you notice it. Most setbacks begin subtly — long before the horse takes a bad step or has a noticeable reaction.

Soft tissue rehab doesn’t usually fail because the initial injury didn’t heal. It fails because the return-to-work phase is rushed, and the tissue is asked to take on more load than it has adapted to handle. Once the horse looks sound, it’s easy to believe the tendon or ligament is fully ready for normal work again. But appearance and readiness are not the same thing.

Healing Doesn’t Mean Strong Enough

When the swelling is gone and the horse moves freely, it’s natural to feel relief — and to want to return to familiar work. But after a tendon or ligament injury, the tissue goes through slow stages of collagen repair, remodeling, and strengthening. During this phase, the horse may look completely normal on the outside while the fibers are still realigning internally.

This is why the first moment a horse feels “back to normal” is actually one of the most delicate points in the entire rehab timeline. The horse is sound enough to move well, but the tissue hasn’t yet regained the durability needed to tolerate increased load, tight turns, jumping, deeper footing, or intense engagement work. The horse is not lying, they truly feel better. The tissue just needs more time to catch up.

Where Reinjury Really Starts

Reinjury often begins during the transition from controlled, straightforward exercise to more complex work. Moving from walking to trotting, adding canter, introducing collection, schooling changes, lateral work, poles, or fences, these phases increase both load and coordination demands. When this shift happens too quickly, the tendon is forced to absorb more strain than it has adapted for, even though the leg looks quiet and the horse moves willingly.

The horse does not typically go lame overnight. Early indications of overload appear first as very small changes: a slightly shorter step, a longer warm-up needed to feel loose, a bit of tightness through the back, a mild loss of push from behind, a hint of unevenness on a circle, or a subtle resistance in transitions. These changes are easy to dismiss as “not a big deal,” especially when the horse is otherwise enthusiastic and workable. 

The Most Important Information Comes After the Ride

What the horse looks like during the work is only half the story. The more telling part comes later — during cool down, in the stall that evening, and especially the next morning. Heat, swelling, thickening, or new sensitivity that appears after the ride signals that the tissue was asked to do more than it was ready for. Even the smallest change matters. Tendons and ligaments don’t “get sore” the way muscles do. Any change is a message, not a warm-up issue.

Successful rehab requires noticing how the horse’s body responds to work, not just how they feel during it.

The Return-to-Work Phase Is Where Soundness Is Made or Lost

Rehab is not about regaining what was. It’s about rebuilding capacity. Tendons regain durability through gradual, structured progression. The horses who return to full work and stay there aren’t the ones who came back the fastest, they are the ones whose teams allowed time for the invisible part of healing to finish.

During the return-to-work phase, soft tissues are adapting to increased load every day. Tendonall is designed to support tendon integrity through this transition, helping progress stay steady and soundness stay strong. The comeback should last, support the structure that makes it possible.

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