Which current GPS running watch offers ECG and heart rate accuracy closest to a chest strap during high-intensity interval track workouts?
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Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
Which current GPS running watch offers ECG and heart rate accuracy closest to a chest strap during high-intensity interval track workouts?
1 real search · 1 real-search pass
2026 best GPS running watches ECG feature optical heart rate accuracy high intensity interval training Apple Watch Ultra 3 Garmin ECGGoogle ↗
OBSERVEDComparison
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
2026 best GPS running watches ECG feature optical heart rate accuracy high intensity interval training Apple Watch Ultra 3 Garmin ECG Google ↗
- Product details · bestbuy.com
- Apple shares the data behind Apple Watch Series 12’s biggest health claim · 9to5mac.com
- I tested the Apple Watch 12’s heart rate accuracy vs a chest strap for running, cycling, HIIT and strength workouts — here's my verdict · tomsguide.com
- I ran a half marathon with the Apple Watch Ultra 3 vs Garmin Forerunner 970 to test the GPS and heart rate accuracy — here’s the winner · tomsguide.com
- The 9 Best Running Watches of 2026, Tested by Runner’s World · runnersworld.com
- The Agreement of Wrist-based Apple Watch and... : Translational Journal of the American College of Sports Medicine · doi.org
- The Best GPS Watches of 2026 · outdoorgearlab.com
- Apple Watch vs Garmin for Runners in 2026: An Honest Comparison - Baseline Blog · baselineathlete.com