Table 3. Data items and characteristics.

Serial number	Data items	Characteristics
1	Study identification	This included the title, authors and year of publication
2	Study design	Information on the type of study (e.g., randomized controlled trial, cohort study), sample size, and duration of the study was extracted
3	Population characteristics	Details about the participants, including age, gender, diagnosis of the genetic muscle-wasting disorder, disease severity, and inclusion and exclusion criteria, were collected
4	Intervention details	Comprehensive information on the physiotherapeutic interventions was recorded. This included the type of intervention (e.g., structured exercise programs, home-based training, intensive physiotherapy), duration, frequency, and intensity of the interventions
5	Comparator details	Data on the comparator groups, including no intervention, standard care, or alternative exercise modalities, were documented
6	Outcome measures	The primary outcome was usually the 6-minute walk test (6MWT). Secondary outcomes included other functional assessments, muscle strength parameters, and quality of life measures
7	Results	The main findings of the studies were recorded, focusing on the quantitative data related to the primary and secondary outcomes. This included mean differences, confidence intervals, p-values, and any reported effect sizes
8	Risk of bias assessment	Information related to the assessment of bias within each study was extracted. This included details on randomization, blinding, incomplete outcome data, and selective reporting