Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Rheumatoid Arthritis ?
    ### Response:
    Rest. People with rheumatoid arthritis need a good balance between rest and exercise; they should rest more when the disease is active and exercise more when it is not. Rest helps to reduce active joint inflammation and pain and to fight fatigue. The length of time for rest will vary from person to person, but in general, shorter rest breaks every now and then are more helpful than long times spent in bed.
    