When you jump and land, the force travels through your skeleton and creates tiny pressure changes inside your bone tissue. Specialised cells detect that pressure and send a message to remodel and get stronger. New bone is formed at precisely the sites that need it most, the hips and spine, which are the areas most at risk of fracture as we age.
In other words, every time you jump and land with intention, you're switching on a biological system that is specifically designed to keep your bones strong.