• Ankylosing Spondylitis Disease Activity : (BASDAI) (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Ankylosing Spondylitis Disease Activity will be assessed with the Bath Ankylosing Spondylitis Disease Activity (BASDAI) auto-questionnaire assessing the inflammatory activity of the disease.
• Ankylosing Spondylitis Disease Activity : (ASDAS CRP) (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Ankylosing Spondylitis Disease Activity will be assessed with the Ankylosing Spondylitis Disease Activity Score (ASDAS CRP) auto-questionnaire assessing the inflammatory activity of the disease.
• Bath Ankylosing Spondylitis Functional Index (BASFI) (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Data collected with the Bath Ankylosing Spondylitis Functional Index (BASFI) auto-questionnaire assessing the functional impact of disease.
• Fatigue (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Fatigue will be assessed with a Visual Analogue Scale
• Health assessment: HAQ-S (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  SpA-related health will be assessed with the Health Assessment Questionnaire for the Spondyloarthropathies (HAQ-S)
• SPA impact on general health: ASAS-HI (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  General health will be assessed with the ASAS Health Index auto-questionnaire
• Work Productivity and Activity : WPAI (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Work Productivity and Activity will be assessed with the Work Productivity and Activity Impairment (WPAI) auto-questionnaire
• Sleep quality: PSQI [ Time Frame: at baseline, 3 months and 6 months ]
  Sleep quality will be assessed with the Pittsburgh Sleep Quality Index (PSQI) auto-questionnaire
• Physical activity: IPAQ (PRO) [ Time Frame: at baseline, 3 months and 6 months ]
  Physical activity will be assessed with the International Physical Activity Questionnaire (IPAQ) - Short Form and Long Form auto-questionnaires
• Analgesic and anti-inflammatory drug intake [ Time Frame: at 3 months and 6 months ]
  Following drugs intake will be collected:

  • non-steroidal anti-inflammatory drugs (NSAIDs)
  • corticosteroids
• Anthropometric measures: BASMI [ Time Frame: at baseline, 3 months and 6 months ]
  The functional impact of SpA will be assessed with the Bath Ankylosing Spondylitis Metrology Index (BASMI)
• Anthropometric measures: Enthesitis: MASES [ Time Frame: at baseline, 3 months and 6 months ]
  Entesis involvement will be assessed with the Maastricht Ankylosing Spondylitis Enthesitis Score (MASES)
• Anthropometric measures: Muscle strength: dynamometer [ Time Frame: at baseline, 3 months and 6 months ]
  Muscle strength of the upper and lower limbs will be assessed with a dynamometer
• Anthropometric measures: 6-minutes walk test [ Time Frame: at baseline, 3 months and 6 months ]
  Walking ability will be assessed with the 6-minutes walking test.
• Anthropometric measures: Body mass index (BMI) [ Time Frame: at baseline, 3 months and 6 months ]
  Weight, height and waist size will be collected to calculate the BMI of patients.

The primary objective of the study is to demonstrate the beneficial effect of a 3 months home-based physical exercise program supervised by online videos, in addition to the usual recommendations, in comparison with usual physical activity as recommended by the WHO.

The secondary objectives of the study are :

1. to compare the following criteria between 2 groups at 3 and 6 months:

   • quality of life;
   • other measures of disease activity ;
   • sleep quality ;
   • walking ability
   • muscle strength of;
   • professional activity;
   • cost of cares;
   • evolution of weight, BMI and waist.
2. to evaluate the observance of physical activity program and its tolerance at 3 and 6 months.

The spondyloarthritides are a group of inflammatory rheumatic diseases, including ankylosing spondylitis, reactive arthritis, inflammatory bowel disease-related rheumatic disease, and psoriatic arthritis.

The frequence of axial spondyloarthritis is 0.41% in the french population. This disease is associated with a reduction of physical capacities and quality of life. NSAIDs or even biologic therapies do not always permit a sufficient control of the disease. Different physical exercise programs can be effective as an additional therapy for spondyloarthritis, with positive effects on spinal mobility as well as main disease activity and functional indices (BASDAI, BASFI and BASMI). The severity of the disease does not seem to influence significantly the patients' motivation in practicing physical activity.

This proposed study aims to demonstrate the beneficial effect of physical exercises coached with a specific internet program diffused on a secured platform.

Each patient will have to connect 3 times weekly in order to follow the entire program.

The impact will be evaluated at 3 months and 6 months.

Potential impacts of video-coaching program are:

• reduction of the intrinsic inflammatory activity of the rheumatic disease;
• improvement of the global physical condition: muscular strength and resistance, walking ability, chest expansion;
• reduction of fatigue and improvement of sleeping;
• reduction of consumption of symptomatic drug (analgesics, NSAIDs, corticosteroids).

• Other: Video coaching exercises
  Patients will perform physical exercises following a specifical video coaching program during 6 months.
• Other: Routine exercises

  Routine method by advising and encouraging patients to perform exercises according to the WHO recommendations during the first 3 months of the study.

  Thereafter, patients will have access to the video coaching program of physical activities during the following 3 months.

• Experimental: Intervention group: video coaching exercises
  Video coaching exercises group: patients will perform physical exercises according to a video coaching program 3 times weekly during 6 months. The on-line program has been designed especially for this study.
  Intervention: Other: Video coaching exercises
• Active Comparator: Control group: routine exercises
  Routine method advising and encouraging patients to perform physical activities according to the WHO recommendations during 3 months then to follow the video coaching physical exercises program during 3 months.
  Intervention: Other: Routine exercises

Inclusion Criteria:

• Patient between 18 and 65 years;
• Patient can read and understand French;
• Signed informed consent form to participate in the study;
• Axial spondylarthritis according to ASAS criteria;
• Patient with a BASDAI score between 2.5 and 5;
• No change of biotherapy anti-TNF or anti-IL17 during the 3 months preceding the inclusion;
• Patient equipped with an internet access;
• Medical certificate of proposed physical activities.

Exclusion Criteria:

• All diseases (cardiovascular disease or chronic neurological disease or others) contraindicating the requested exercises according to physician;
• Axial spondyloarthritis in remission defined by a BASDAI < 2.5/10 or in excessive inflammatory activity, defined by BASDAI > 5/10;
• Pregnant woman (positive pregnant test) or woman try to conceive in following 6 months;
• Patient with articular prosthesis;
• Patient who already participate in a specific exercise program or practice a sport (including Yoga or Tai Chi) more than one hour per week;
• Severe obesity ( BMI > 35);
• Patient without health insurance;
• Patient legally unable.