Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous
from The Verge
Fitness trackers aren’t very accurate when it comes to measuring heart rate, especially if you’re doing a hard workout, researchers say. This could be risky for people who might push themselves too hard, and frustrating for those who wonder why a short jog makes their heart rate skyrocket. Researchers recruited 50 healthy volunteers to test four popular fitness trackers for a study published this week in JAMA Cardiology.
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