We are our behaviours, and habits make or break us. So we really should work on building good habits that support our health, as young as possible.
It is best if physical exercise can be done from a young age because today's children live in a digital age. But during my childhood, I did not need to do exercises separately due to playing many outdoor sports. If you don't pick up exercise from a young age or as a habit, you have to struggle a lot to make it a habit in adulthood. Because some physical pains can occur during exercise and are difficult to bear.