You must have experienced excruciating pain, muscle spasms, and contractions after a game of Tennis, or after running long distances. This muscle spasm is commonly known as Charley horse. The other names for this condition include, 'dead leg', 'granddaddy', 'chopper', 'corked thigh', or 'corky', etc., according to different country languages. This condition is very commonly observed in athletes, as it occurs after carrying out a strenuous exercise.