The news desk
On October 13, 2026, iRun Ultra published a report by Joe Uhan arguing that persistent hip, anterior thigh, and knee pain in runners may be referred from the upper lumbar spine at L1 to L3 rather than originating in the joint itself. The report lists diagnostic clues: sudden onset without a mechanism, pain poorly correlated with activity, and symptoms that change with spinal position. It also notes that leg imaging and standard orthopedic treatment often miss the cause. No earlier reports on this specific explanation appear in the supplied coverage, so the chronology consists of this single account. The report offers no patient cases, outcome data, or responses from other clinicians, and no conflicting figures or dates are present in the material provided.
Joe Uhan explains that stubborn hip, anterior thigh, and knee pain in runners can be referred from the upper lumbar spine at L1 to L3 rather than from the joint itself. He lists diagnostic clues, including sudden onset without a mechanism, pain poorly correlated with activity, and symptoms that change with spinal position, and notes that leg imaging and standard orthopedic treatment often miss the cause.