Kat Fu, M.S., M.S.

The challenge in addressing poor sleep is not finding more things to try—it’s finding the right thing for your specific situation. Sleep trackers show the signatures of poor sleep but estimate stages at only 60-70% accuracy and cannot explain why. Your lived disruption pattern—morning vitality, cognitive function, how rested you feel—reflects what these tools miss:

When you’ve addressed your specific internal sleep disruptors and builders, sleep becomes robust enough to handle everyday variables—including screens before bed. The more significant question isn’t whether you’re watching Netflix; it’s whether your internal sleep architecture has two key sides working together: disruptors that block the body’s capacity for sleep, and builders that create it.

Having a 50-step pre-bed routine while still plateauing at 4-5 bad nights a week points to a specific gap: removing sleep obstacles and building the internal capacity to create sleep are two different things. The sleep hygiene approach addresses external factors like blue light, room temperature, and mattresses, but those adjustments don’t build the body’s

The distinction between treating and solving sleep problems explains why considerable effort can produce minimal lasting change. Treating removes obstacles—environmental adjustments like cooling your room, blue light blockers, and white sound machines that prevent disruption or make poor sleep more manageable. Solving targets what generates sleep capacity in the first place: the underlying architecture that

Poor sleep is a indicator—not the problem itself. That distinction matters because the same observable complaint can arise from different underlying causes, and applying the wrong approach to the wrong cause either produces no change or makes things worse. The Vault 5-Part Sleep Clarity Series begins here: with a framework for understanding what’s driving the