24/10/2025
🧠💥 Stress and pain are not separate experiences - they are deeply intertwined physiological processes.
When we work with animals in rehabilitation, it’s easy to think of pain as a purely physical problem, something rooted in tissue damage, joint pathology, or nerve irritation, and stress as an emotional or behavioural state. But research continues to show that the two are inseparable.
Here’s why 👇
🔄 The Pain-Stress Loop
Pain activates the body’s stress response. Stress hormones like cortisol and adrenaline flood the system, preparing the body to protect itself. But when that stress response becomes chronic - because the pain is ongoing, because the environment is overwhelming, or because the animal feels unsafe - it changes how pain is processed.
The nervous system becomes sensitised. The pain threshold drops. Pathways that were once only triggered by actual tissue damage can now be activated by much lower levels of input - or by the anticipation of pain.
💡 In other words: chronic stress makes pain feel worse, and chronic pain increases stress. The two feed into each other, creating a self-perpetuating cycle that can derail healing.
🐶 What This Looks Like in Practice:
You’ve probably seen it 👉 the dog that guards a limb even after the injury has healed. 👉 The horse that braces its back long after the saddle fit has been corrected. 👉 The patient that seems “stuck” despite good clinical interventions.
These are not stubborn patients. They are animals whose nervous systems are still in protection mode. Their bodies haven’t received enough evidence that it’s safe to let go, so they keep holding tension, moving defensively, and interpreting neutral sensations as painful.
🩺 Rehab Implications 👇
If we focus only on the musculoskeletal system, we miss a huge part of the picture. Stress states affect:
👉Muscle tone: chronically elevated, leading to stiffness and reduced range of motion.
👉 Posture: protective patterns become habitual and hard to break.
👉 Healing: stress hormones slow tissue repair and impair immune function.
👉 Movement quality: anticipation of pain alters gait long before tissue tolerance is reached.
This means that even the best-designed exercise program can fail if the nervous system isn’t ready to participate.
🌿 How We Can Intervene:
✔️ Incorporate calming strategies into rehab sessions: slow handling, predictable routines, familiar environments.
✔️ Educate owners about stress-reduction at home: consistency, positive reinforcement, and safe spaces matter.
✔️ Use graded exposure to movement, gradually re-teaching the nervous system that it is safe to move without pain.
✔️ Combine physical treatment with emotional support: because regulation of the autonomic nervous system is part of rehabilitation, too.
💡 The takeaway: If we want to reduce pain, we must also reduce stress. Rehabilitation isn’t just about muscles, joints, or fascia - it’s about the entire system, including the brain’s interpretation of safety and threat.