In this episode of Fit Happens x NUMO, we talk with Michèle Widmer, Senior Orthopedic Physician at UKBB, about growth and development from early childhood to post-puberty. Bone growth is only about 50% genetically determined. The other 50% is influenced by stress, movement, and sports. We discuss why movement is crucial for cell recruitment in bones, the role feet play in child development, and why sports in early years lay an important foundation for a healthy future.