That may be the best way to learn this skill, but really any physical activity will contribute. If, as a child, you've wrestled with your sibling, or played tag, or played soccer, or skateboarded, or indeed, ridden a bike, you've practiced keeping your head off the ground when falling.

As an adult, I have catastrophically wrecked, at high speed, on asphalt, both while cycling (destroyed the front fork) and while rollerblading, without a helmet, and in both cases flipped and skidded on a shoulder without touching my head. As a child, I had done that when falling from horses.