Generalized Joint Hypermobility

The goal of this clinical trial is to assess the effect of whole body vibration (WBV) on postural stability, flexibility of the lumbar-pelvic-hip complex and lower leg muscles, and jumping ability in basketball players aged 9-15 years. The main questions it aims to answer are: Does WBV affect the level of postural stability in basketball players aged 9-15 years? Does WBV affect the level of postural stability in basketball players aged 9-15 years? Does WBV affect the flexibility of the iliopsoas, rectus femoris, posterior group of hamstrings, soleus and gastrocnemius in basketball players aged 9-15 years? Does WBV affect the jump height, relative peak power, contraction time in basketball players aged 9-15 years? Participants will take part in 6 vibration sessions at 20Hz over 6 weeks. Vibration will be performed on the Galileo Med35 platform (3x3 min).