Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: Rheumatologists are discussing, whether rehabilitation of patients with low back pain (LBP) can be improved. At present patients with LBP start treatment as soon as possible, this also applies for patients with chronic low back pain (CLBP) - pain lasting over 12 weeks. At Glostrup University Hospital department of Physical Medicine/rheumatology we use a method (method A) where an interdisciplinary team gives the patients a treatment composed of various topics. This includes among other things education, physical team training, exercises in swimming pool, stretching exercises, and occupational therapy. A different method (method B) originates from the Rehabilitation centre in Karlslunde led by Teddy Oefeldt. Here they focus strictly on dynamic training of muscles in the back and the buttocks. A therapist, who in the beginning partly carries the patient through the exercises, assists this training.

In both methods, individually considerations are taken, but to a greater extend in method B. The treatment will extend over a three months period.

A few earlier investigations have compared these two methods, but they have not been systematized to such a degree, that they gave any final conclusions. Therefore, we initialized an investigation including a larger number of patients, where the two methods are compared from the results the patients achieve after 3, 6, 12 and 24 months.

286 consecutive patients were included and randomized to one of the two methods. Those, who did not wish to participate in the investigation, were treated according to the department's normal procedure (Method A)


Options:
A: Inclusion Criteria:

* Unspecific subacute, subacute remitting and chronic LBP
* Both sexes, 20-60 yrs of age
* LBP between 2-8 on a 11-pt numeric rating scale

Exclusion Criteria:

* Previous back surgery
* Sick listed more than one year
* Radiating pain below knee or motor deficits
* Systemic diseases and "red flags"
* Diagnosed psychiatric disease
* Ingoing insurance claim
* Pregnancy
B: Inclusion Criteria:

1. Low Back Pain lasting more than 12 weeks with or with out pain radiating into the leg(s)
2. Age 18 - 60 years

Exclusion Criteria:

1. Serious spinal pathology

   1. Malignancy
   2. Osteoporosis,
   3. Fresh vertebral fracture
   4. Newly operation on the back
   5. Stenosis of the lumbar spine
   6. Unstable spondylolistesis
   7. Infections in the back
2. Neurological dysfunction of the thoracic or abdominal muscles
3. Pregnancy/breastfeeding
4. Mental illness
5. Health conditions which prohibit intensive training.
6. Languish problems/ dyslexia
C: Inclusion Criteria:

* Ages 18 - 35 years old (or emancipated minor)
* Participating in 91 W (combat medic) MOS training
* English speaking and reading

Exclusion Criteria:

* Currently seeking medical care for LBP
* Previous medical history that includes any surgery for LBP (examples include but are not limited to lumbar fusion, lumbar decompression, and lumbar discectomy)
* History of degenerative joint disease, arthritis, spine trauma or vertebral fractures, spondylolisthesis, and congenital spine disorders
* Currently unable to participate in AIT due to injury in foot, ankle, knee, hip, neck, shoulder, elbow, wrist, or hand injury.
* History of fracture (stress or traumatic) in proximal femur and/or pelvis
* Pregnancy (Note: Pregnancy will not result in termination from the study, even though it is an exclusion criteria at enrollment.)
D: Inclusion Criteria:

* Subjects of both genders between 18 and 65 years of age with chronic non-specific LBP (pain for more than 3 months) with a pain intensity of at least 3 points measured by a 0-10 points pain numerical rating scale
* Subjects must be able to stand and walk independently
* Subjects must be able to read in Portuguese

Exclusion Criteria:

* Subjects with any contraindication to physical exercise according to the guidelines of the American College of Sports Medicine
* Subjects with severe depression (measured by depression, anxiety and stress scale - DASS)
* Subjects with serious spinal pathologies (fractures, tumors, and inflammatory pathologies such as ankylosing spondylitis), nerve root compromise (disc herniation and spondylolisthesis with neurological compromise, spinal stenosis, and others), serious cardiorespiratory diseases, previous back surgery or pregnancy.
* Subjects that cannot be classified into any of the five categories of the Movement System Impairment model upon initial assessment

Answer: B