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Effort thrombosis in the lower extremity of a runner

common problem evaluated in sports medicine clinics or treated by the athlete himself. Although often grouped under the classification of the shin splint syndrome, these injuries arise from a variety of etiologies. 1,2 Strains, tendonitis, and stress fractures make up the majority of these injuries. The athlete most commonly complains of pain in the leg after exercise, which may be progressive in nature such that the pain is noted during exercise and may become so disabling as to prevent exercise. Fortunately, most of these problems are selflimited and respond readily to a variety of therapeutic regimens or lack of them and rest. Soon the