María Resano-Zuazu, Jorge U. Carmona, César Fernández-de-las-Peñas, David Argüelles © 2026 The Authors. Published by Elsevier Ltd. Myofascial pain syndrome (MPS) is a well-recognised cause of muscle pain in people, but we know much less about how it presents in horses. This study investigated 120 horses to identify the most important signs of MPS in the back (thoracolumbar) region and to explore whether factors such as behaviour, management, and housing might be linked to the