Here is the design of a clinical trial:

Official Title: Efficiency of an Optimized Care Organization for Fibromyalgia Patients Within the Group of Hospitals of Loire Territory. Interventional Study Aimed at Changing Behaviour in Terms of Physical Activity and Sedentary

Included conditions:
- Fibromyalgia
- Physical Activity

Study Armgroups:
- {'label': 'fibromyalgia patients with physical activity program', 'type': 'EXPERIMENTAL', 'description': 'Two weekly exercise sessions at the university hospital of St-Etienne for 1 month then relay outside in a sports association or club certified "Sports Health" in the Loire (42) or Haute-Loire (43) for 2 months.', 'interventionNames': ['Other: physical activity program']}
- {'label': 'fibromyalgia patients with physical activity at home', 'type': 'OTHER', 'description': 'Advice and recommendations of physical activity at home (= current clinical practice, from 1 to 3 sessions per week in autonomy).', 'interventionNames': ['Other: Advice and recommendations of physical activity at home']}

Interventions:
- {'type': 'OTHER', 'name': 'physical activity program', 'description': 'Two weekly exercise sessions at the university hospital of St-Etienne for 1 month then relay outside in a sports association or club certified "Sports Health" in the Loire (42), Haute-Loire (43) or Ardèche (07) for 2 months.', 'armGroupLabels': ['fibromyalgia patients with physical activity program']}
- {'type': 'OTHER', 'name': 'Advice and recommendations of physical activity at home', 'description': 'Advice and recommendations of physical activity at home (= current clinical practice, from 1 to 3 sessions per week in autonomy).', 'armGroupLabels': ['fibromyalgia patients with physical activity at home']}

Primary Outcomes:
- {'measure': 'physical activity', 'description': 'Measure the durability of adherence/therapeutic compliance of fibromyalgia patients based on an objective measurement of physical activity: average measured from 7 days of actimetry, Actigraph', 'timeFrame': '12 months'}

Please estimate the sample size based on the assumption: 
Alpha risk of 5%, power set at 90%, and an expected dropout rate of 10%.
Sample Size
        Population size is calculated on an expected difference of 20% of the level of MVPA (â¥3 METs for metabolic equivalent tasks). Estimating that at baseline, patients are at 3.9 MET-h/week with a standard deviation between 2 and 4 (40), for an alpha risk of 5% and a potency set at 90%, we need to include 150 patients per group; adding an expected dropout rate of 10%, it is necessary to include 165 patients per group to meet the main goal, which means a total of 330 patients.