Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effects of Training and Relaxation on Fibromyalgia.
Brief Summary: Effects of physical training and relaxation exercise on pathophysiological mechanisms and symptoms in finbromyalgia patients.


Options:
A: Inclusion Criteria:

* Criteria diagnosis according ACR 1990
* Wash-out of medication specific for fibromyalgia for 1 month
* Only paracetamol 750mg will be allowed during the period of study.

Exclusion Criteria:

* Alterations that against indicate the practical one of physical activity evaluated previously in clinical and rheumatology evaluation
B: Inclusion Criteria:

* Age 21 years or older.
* Fulfills the American College of Rheumatology (ACR) 1990 classification criteria for FM: (1) a history of widespread musculoskeletal pain on the right and left sides of the body as well as above and below the waist for a minimum duration of 3 months, and (2) pain in 11 or more of 18 specific tender points with moderate or greater tenderness reported upon digital palpation.27
* Fulfills the ACR 2010 diagnostic criteria for FM: (WPI ≥7 AND SS ≥5) OR (WPI 3-6 AND SS ≥9) and does not have a disorder that would otherwise explain the pain28
* Willing to complete the 12-week or 24-week study, including once or twice-a-week exercise sessions.
* Willing to abstain from Tai Chi or other new formalized exercise programs until completion of the study if randomized to the Aerobic Exercise.
* Willing to abstain from Aerobic Exercise or other new formalized exercise programs until completion of the study if randomized to Tai Chi

Exclusion Criteria:

* Prior experience with Tai Chi or other similar types of Complementary and Alternative Medicine in the past 1 year such as Qi gong and yoga since these share some of the principles of Tai Chi.
* Dementia, neurological disease, cancer, cardiovascular disease, pulmonary disease, metabolic disease, renal disease, liver disease, or other serious medical conditions limiting ability to participate in the Tai Chi or Aerobic Exercise programs, as determined by the study physicians.
* Any other diagnosed medical condition known to contribute to FM symptomatology that is not under adequate control for the study period such as thyroid disease, inflammatory arthritis, systemic lupus erythematosus, rheumatoid arthritis, myositis, vasculitis or Sjogren's syndrome.
* Inability to pass the Mini-Mental Status examination (with a score below 24) 29
* Enrollment in any other clinical trial within the last 30 days
* Plan to permanently relocate from the region during the trial period
* Positive urine pregnancy test at baseline or planning pregnancy within the study period
* Not English-Speaking: English is the only language to be used during the exercise training program. Our self-reported outcome measures are obtained from validated English-version questionnaires. In addition, using other languages would likely require separate classes, recruitment and instructors which are beyond our current study scope
C: Inclusion Criteria: ACR 1990 criteria for fibromyalgia -

Exclusion Criteria: Other dominating pain condition, severe disease preventing from participating in physical exercise

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D: Inclusion Criteria:

* Age: 35-65 years.
* Meeting the American College of Rheumatology criteria: widespread pain for more than 3 months, and pain with 4 kg/cm of pressure reported for 11 or more of 18 tender points.
* Not to have other severe somatic or psychiatric disorders, or other diseases that prevent physical loading (Answer "no" to all questions on the Physical Activity Readiness Questionnaire-PAR-Q ).
* Not to be engaged in regular physical activity \>20 minutes on \>3 days/week.
* Planning to stay in the same Association during the study.
* Able to ambulate, with or without assistance.
* Able to communicate.
* Informed consent: Must be capable and willing to provide consent.

Exclusion Criteria:

* Acute or terminal illness.
* Myocardial infarction in the past 3 months.
* Not capable to ambulate.
* Unstable cardiovascular disease or other medical condition.
* Upper or lower extremity fracture in the past 3 months.
* Severe dementia (MMSE\<10).
* Unwillingness to either complete the study requirements or to be randomised into control or training group.
* Presence of neuromuscular disease or drugs affecting neuromuscular function.

Answer: C