This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. A smartwatch glowing on a runner’s wrist may look authoritative, but wearable data is best ...

Fitness trackers and smartwatches are worn 24/7—which can lead to skin irritation if you're not careful. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal ...