Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Laing distal myopathy ?
    ### Response:
    Laing distal myopathy is a condition that affects skeletal muscles, which are muscles that the body uses for movement. This disorder causes progressive muscle weakness that appears in childhood. The first sign of Laing distal myopathy is usually weakness in certain muscles in the feet and ankles.
    