Why do my knees ache with a dull pain when I sit in a cramped movie theater seat?
1. Introduction A dull aching pain in the knees after sitting in a cramped position is clinically known as the movie theater sign, a hallmark symptom of patellofemoral pain syndrome. Prolonged flexion of the knee forces the kneecap tightly against the underlying thigh bone, increasing mechanical pressure on the articular cartilage. This sustained compression restricts … Read more