FoundMyFitness · 2025-10-06 · Rhonda Patrick (host), Michael Grandner
Why You Can’t Sleep (and How to Fix It) | Dr. Michael Grandner
108 research-tied claims examined: 2 contradicted 5 overstated 9 context 78 supported 1 corroborated online 13 unverified
1 Corroborated by web sources
Commercial wearable sleep trackers cannot differentiate between stage 1 and stage 2 NREM sleep and combine them into a single light sleep category.
"first of all, it can't distinguish stage one and stage two at all. So they call it light usually" (said at 2:46:16)
No published record matching the claim that commercial wearable sleep trackers cannot differentiate between stage 1 and stage 2 NREM sleep and instead combine them into a light sleep category was located; this does not prove the claim false.
corroborated by web sourcesConsumer wearable devices rely on heart-rate and movement sensors rather than EEG brain-wave monitoring, grouping NREM stages 1 and 2 together into a single "light" (or "core") sleep stage.
nih.govkygo.app
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.