WILDing isn't about holding your body perfectly still. The more you move, the harder it will be to WILD, that much is true. But it's not a real important aspect of the WILD. Swallowing does nothing more than maybe prevent you from falling asleep at the moment you do it. It not like it resets some biological countdown clock. We all know that frequently moving will make it harder to fall asleep. But it's not as if holding still for a certain amount of time will get you a WILD.

You perform a WILD by doing nothing more than staying aware as you fall asleep. You're not tricking your body or anything. It's very simple, but still difficult to do because it appears to be a contradiction of everything we think we know about sleep.