Inertial measurement unit sensors are transforming equine lameness detection, enabling objective quantification of subtle gait asymmetries that clinical observation may miss.
Objective lameness detection has significant welfare implications because subtle, early-stage lameness is often overlooked under conventional subjective evaluation. Horses performing with undiagnosed low-grade lameness experience ongoing discomfort while continuing to be worked — a welfare failure that better detection can prevent. Sensor technology removes the subjectivity from lameness assessment, enabling earlier diagnosis, better treatment monitoring, and clearer communication between owners, trainers, and veterinarians. The ability to demonstrate objectively whether a horse is lamer, the same, or improved after treatment represents a major advance over the previous standard of expert opinion. Widespread adoption of objective lameness technology has the potential to substantially reduce the population burden of untreated or undertreated equine pain.