Regularly test and train your ability to move from the floor

Hip mobility is one of the clearest signs of whether your body still has useful movement options. As a basic standard, you should be able to squat with your hip crease below your knee, stand on one leg and pull the other knee above 90 degrees, and get down to the floor and back up without obvious compensation. A simple way to assess this is the sit-and-rise test: stand up, cross one foot in front of the other, sit down into a cross-legged position without using your hands, knees, or another surface for support, then rise back up the same way. The test is not magic, but it reveals hip range of motion, balance, coordination, and movement problem-solving. Use it as both an assessment and a practice.