Why does my smartwatch heart rate accuracy drop so much during outdoor interval runs when the weather gets really cold outside?
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Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
Why does my smartwatch heart rate accuracy drop so much during outdoor interval runs when the weather gets really cold outside?
1 real search · 1 real-search pass
wrist-worn photoplethysmography cold temperature skin blood flow heart rate accuracy exercise studyGoogle ↗
OBSERVEDReason
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (1)
Classes come from the query-classifier (a local Laya model).
Searches and sources
ChatGPT1 real searches · gpt-6
wrist-worn photoplethysmography cold temperature skin blood flow heart rate accuracy exercise study Google ↗
- Wrist-Worn and Arm-Worn Wearables for Monitoring Heart Rate During Sedentary and Light-to-Vigorous Physical Activities: Device Validation Study · pmc.ncbi.nlm.nih.gov
- JMIR Cardio - Wrist-Worn and Arm-Worn Wearables for Monitoring Heart Rate During Sedentary and Light-to-Vigorous Physical Activities: Device Validation Study · cardio.jmir.org
- Investigating sources of inaccuracy in wearable optical heart rate sensors · nature.com
- Consumer Wearable Health and Fitness Technology in Cardiovascular Medicine: JACC State-of-the-Art Review · jacc.org