Real ChatGPT answer · index seedn2B1lPI90dgcompleteHealth and wellness · fitness and exerciseinformational

How does optical heart rate sensing technology on fitness trackers like the Fitbit Versa actually measure pulse during movement?

ChatGPTgpt-61 query11/1/2026
Download run

Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
How does optical heart rate sensing technology on fitness trackers like the Fitbit Versa actually measure pulse during movement?
1 real search · 1 real-search pass
Fitbit optical heart rate sensor green LEDs photoplethysmography motion artifacts accelerometer signal processingGoogle ↗
OBSERVED

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.

Classifying 1 queries…

Searches and sources

Queries

1 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Fitbit optical heart rate sensor green LEDs photoplethysmography motion artifacts accelerometer signal processing
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1