Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Glycogen storage disease type 13 ?
    ### Response:
    What are the signs and symptoms of Glycogen storage disease type 13? Glycogen storage disease type 13 causes muscle pain (myalgia).  Individuals with GSD13 also experience exercise intolerance, which means they have difficulty exercising because they may have muscle weakness and tire easily.
    