A pulled calf muscle occurs in the muscles of the lower leg, called twin muscles or gastrocnemius. This is one of the most common muscle strains. It affects especially runners and soccer players. A pulled calf muscle usually occurs during acceleration or on the run. A sharp and sudden pain in the calf appears along with the inability to walk without pain and great difficulty in raising the affected limb. Treatment includes the immobilization of the leg associated with analgesics. Physical therapy can help and enables the bleeding to drain and return flexibility to the muscle fibers.