Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) collagen VI-related myopathy ?
    ### Response:
    Collagen VI-related myopathy is a group of disorders that affect skeletal muscles (which are the muscles used for movement) and connective tissue (which provides strength and flexibility to the skin, joints, and other structures throughout the body). Most affected individuals have muscle weakness and joint deformities called contractures that restrict movement of the affected joints and worsen over time.
    