Data collection and analysis
Data was collected through individual motor tests before and after intervention (3 weeks). In this process, shoulder mobility was measured on both sides using a laser device, in both sagittal and frontal plane (lateral arm movement and forward flexion). Shoulder height and arm length were quantified (in neutral subtalar position), as was the diagonal from the fingertips to the floor at maximum abduction. The inner shoulder angle was described using the law of cosine. Strength performance was tested by an electronically operated bench press (Milon®). The test consisted of three attempts, so the measured force corresponded to approximately 93% of the maximum force (1RM). The lowest recommended weight (in kg) was noted for further analysis. To ensure equal conditions for each participant, all measurements were carried out by the study director and in the same chronological order. After data collection and preparation, data was tested for normal distribution using the Kolmogorov-Smirnow test and histograms; all data met this criterion.Data analysis was realized using descriptive statistics as well as individual graphical growth plots to provide transparency of raw data and avoid the superficiality of average growth trajectories [