Here is the design of a clinical trial:

Official Title: Effect of Mobile Health Technology (mHealth), Exercise Adherence and Optimal Nutrition Post Rehabilitation Among People With Parkinson's Disease

Included conditions:
- Parkinson Disease

Study Armgroups:
- {'label': 'Control group', 'type': 'NO_INTERVENTION', 'description': 'Participants is encouraged to follow the home-based rehabilitation plan based on the recommendations from the rehabilitation center. No further follow up except for testing at 12 weeks and six months.\n\nAfter the completion of the study the control group will be offered a session of individual exercise and diet guidance as well as a period of digital follow-up as needed.'}
- {'label': 'Intervention group', 'type': 'EXPERIMENTAL', 'description': 'Participants will receive a session of individual exercise and diet guidance with focus on goals and motivation for diet and exercise and help to overcome any barriers for self-efficacy. They will also receive an activity tracker and an introduction on how to use it. Further they will receive a monthly digital follow-up to provide support and address questions and goals regarding nutrition, daily energy expenditure and exercise. The participants can also send sms if they have questions during the follow-up period. They will be encouraged to continue to follow the home-based rehabilitation plan based on the recommendations from the rehabilitation center. If needed they can get help to find suitable exercise groups in their own municipality. The Garmin wristband will be used to facilitate daily activity and continuing exercise at recommended intensity level at home. Participants who are malnourished, or at risk of malnutrition, will receive specific guidance session on nutrition.', 'interventionNames': ['Behavioral: Digital follow-up']}

Interventions:
- {'type': 'BEHAVIORAL', 'name': 'Digital follow-up', 'description': 'Participants will receive:\n\nOne session of individual exercise and diet guidance focusing on goals and motivation.\n\nAn activity tracker and instructions on how to use it both for motivation, daily activity tracking, logging of specific exercise and using the wristbands heart rate monitor to control intensity level during exercise.\n\nMonthly digital follow-up to provide support and address questions and goals regarding nutrition, daily energy expenditure and exercise.\n\nOpportunity to send sms with questions regarding nutrition and exercise. Participants who are malnourished, or at risk of malnutrition will be offered a total of two hours of additional individualized, digital guidance on nutrition as needed.', 'armGroupLabels': ['Intervention group']}

Primary Outcomes:
- {'measure': 'Six minute walk test (6MWT)', 'description': 'A sub-maximal exercise test used to assess aerobic capacity and endurance. The distance covered over a time of 6 minutes is used as the outcome by which to compare changes in performance capacity. It evaluates the functional capacity of the individual.', 'timeFrame': 'measured at baseline, 12 weeks and 6 months'}

Please estimate the sample size based on the assumption: 
A significance level of 0.05 and 80% power is assumed. The sample size is expanded by 20% to account for possible losses during follow-up.
Sample size calculation
        The primary outcomeÂ of the current study is the difference between groups in physical capacity, measured by the 6MWT. Previous studies among older adults have defined a substantial, meaningful change between groups in the 6MWT to be a mean (SD) of 50 (80) meters. This estimate requires 82 participants, 41 in each group, and a clinical trial with an independent comparison of two groups at a significance level of 0.05 and 80% power is assumed. Considering possible losses during follow-up, the sample will be expanded by 20% (20 participants). Thus, 100 participants will be included in total [113].