Here is the design of a clinical trial:

Official Title: Feasibility and Safety of Physical Exercise Program in Men With Prostate Cancer Receiving Androgen Deprivation Therapy and Radiotherapy

Included conditions:
- Prostate Cancer
- Androgen Deprivation Therapy
- Radiotherapy

Study Armgroups:
- {'label': 'PE intervention', 'type': 'EXPERIMENTAL', 'description': 'Aerobic, resistance, and neuromotor exercise', 'interventionNames': ['Behavioral: PE Intervention']}

Interventions:
- {'type': 'BEHAVIORAL', 'name': 'PE Intervention', 'description': 'Each single exercise session will last for one hour and will consist of a combination of the following elements:\n\n* Aerobic Exercise (AE): 20-30 minutes at moderate-high intensity, from 60 to 80% of the maximum heart rate (% HRmax).\n* Resistance Exercise (RE): 30 minutes of strength activity of the major muscle groups.\n* Neuromotor Exercise (NE): will be integrated with strength exercises and will consist of jumping, balance and coordination activities', 'armGroupLabels': ['PE intervention']}

Primary Outcomes:
- {'measure': 'Feasibility - Recruitment rate', 'description': 'Percentage ratio between patients included in the study and number of participants screened for recruitment.', 'timeFrame': 'At baseline (T0)'}
- {'measure': 'Feasibility - Adherence rate to the exercise program', 'description': 'Determine the percentage of patients adhering to the program and the weekly exercise sessions.', 'timeFrame': 'Throughout the 20 week study period'}
- {'measure': 'Feasibility - Dropout rate', 'description': 'Percentage of patients that withdraw from the study and the reason to withdraw', 'timeFrame': 'Throughout the 20 week study period'}
- {'measure': 'Feasibility - Safety/Adverse events', 'description': 'Any adverse events, related or not related to the exercise program, will be documented', 'timeFrame': 'Throughout the 20 week study period'}
- {'measure': "Feasibility - Compliance and patients' experience", 'description': 'Determined by qualitative evaluation, using interviews, to assess experiences, accessibility and acceptability of the exercise intervention.', 'timeFrame': 'Following the study conclusion at 20 weeks.'}

Please estimate the sample size based on the assumption: 
Not explicitly stated.
Sample size calculation
        No formal sample size requirement is needed for this single-group, pilot, feasibility study. At the Santa Maria Nuova Hospital of Reggio Emilia, nearly 30 patients/year undergo ADT and RT, and we aim to recruit 25 patients during the 12-month recruitment period.