Here is the design of a clinical trial:

Official Title: Effect of a Common Exercise Programme With an Individualized Progression Criterion Based on the Measurement of Neuromuscular Capacity Versus Eccentric Training for Lower Limb Tendinopathies (MaLaGa Trial): Randomised Clinical Trial

Included conditions:
- Tendinopathy

Study Armgroups:
- {'label': 'Best current practice exercise programme', 'type': 'ACTIVE_COMPARATOR', 'description': 'Therapeutic physical exercise, best current practice:\n\nAchilles tendinopathy: ALFREDSON ECCENTRIC PROTOCOL: two exercises performed eccentrically, twice daily, 7 days/week, 14 weeks (6 weeks are added to the program to match the volume of weeks of the experimental group).\n\nPatellar tendinopathy: ALFREDSON ECCENTRIC PROTOCOL: one exercise performed eccentrically, twice daily, 7 days/week, 14 weeks (6 weeks are added to the program to match the volume of weeks of the experimental group).\n\nGluteal Tendinopathy: EXERCISE LEAP PROTOCOL, from daily to twice weekly, 14 weeks (6 weeks are added to the program to match the volume of weeks of the experimental group).', 'interventionNames': ['Other: Best current practice exercise programme']}
- {'label': 'Experimental exercise programme', 'type': 'EXPERIMENTAL', 'description': 'Therapeutic physical exercise common for the three locations (Achilles, patellar and gluteal tendinopathy), based on an individual dosage and neuromuscular adaptations (five stages):\n\nStrength training four exercises, once daily, three times/week, 14 weeks Aerobic training: Once daily, twice weekly', 'interventionNames': ['Other: Experimental exercise programme']}

Interventions:
- {'type': 'OTHER', 'name': 'Best current practice exercise programme', 'description': 'Therapeutic Physical Exercise programme based on the protocol of Afredson (for Achilles and patellar tendinopathies) and LEAP (for gluteal tendinopathy).\n\nAchilles tendinopathy: ALFREDSON ECCENTRIC PROTOCOL: 3 sets of 15 repetitions of two eccentric exercises\n\nPatellar tendinopathy: ALFREDSON ECCENTRIC PROTOCOL: 3 sets of 15 repetions of one eccentric exercise\n\nGluteal Tendinopathy: EXERCISE LEAP PROTOCOL: an exercise programme divided into stages with progression in different exercises, volumes and loads', 'armGroupLabels': ['Best current practice exercise programme'], 'otherNames': ['Alfredson protocol', 'LEAP protocol']}
- {'type': 'OTHER', 'name': 'Experimental exercise programme', 'description': 'Therapeutic Physical Exercise programme structured in five stages oriented to specific neuromuscular adaptations based on the characteristics of the neuromuscular system, once daily, three times/week, sets, repetitions and load based on individually performed tests.', 'armGroupLabels': ['Experimental exercise programme'], 'otherNames': ['MaLaGa protocol']}

Primary Outcomes:
- {'measure': 'Victorian Institute of Sport Assessment (VISA) questionnaire POST', 'description': 'Visa-A for Achilles tendon, Visa-P for Patellar tendon, Visa-G for Gluteal tendon: functional mobility, life participation, and pain. Assessed from 0 (worst value) to 100 (best value).', 'timeFrame': 'Post, 14 weeks after start of the intervention (when intervention is finished)'}

Please estimate the sample size based on the assumption: 
Significance level (α) of 0.05, power of 0.8, and a 15% dropout rate
Sample size
        The treatment effect will be evaluated by comparing success rates on the VISA measurements at follow-up between groups. With an a priori calculation based on the effect size of the LEAP study for gluteal tendinopathy (d=0.59),17 and using an Î± value of 0.05 and a power of 0.8, the sample size is estimated at 44 participants per arm. Assuming losses of 15% of the sample in the follow-up measurement, the necessary sample size will be of 52 participants per group for a total sample of 104 participants.