Protocol Glossary
Science-backed definitions for every term in your health data: plain English and the mechanism behind it.
Slow-Wave Sleep (Deep Sleep)
The deepest sleep stage, where your body actually rebuilds
→ Read definitionCircadian Rhythm
Your body's internal 24-hour clock: the master scheduler of nearly every biological function
→ Read definitionSleep Architecture
The internal structure of your sleep, not just how long, but how deep
→ Read definitionREM Sleep
The sleep stage where your brain consolidates memory and regulates emotion
→ Read definitionSleep Efficiency
The percentage of your time in bed actually spent asleep
→ Read definitionSleep Latency
How long it takes to fall asleep after getting into bed
→ Read definitionSleep Debt
The accumulated deficit between the sleep you need and the sleep you get
→ Read definitionSleep Fragmentation
Repeated brief awakenings that break sleep continuity without always waking you fully
→ Read definitionSleep Inertia
The grogginess and cognitive impairment that follows waking from deep sleep
→ Read definitionChronotype
Your biological preference for when to sleep and be alert
→ Read definitionSocial Jetlag
The circadian disruption of sleeping on a different schedule every week
→ Read definitionSleep Pressure (Homeostatic Sleep Drive)
The biological urge to sleep that builds every hour you are awake
→ Read definitionWASO (Wake After Sleep Onset)
Total minutes spent awake after first falling asleep
→ Read definitionMore terms added regularly. Check back for new entries across all categories.
