The Fitbit Air is Google’s new entry-level fitness tracker, and when Google announced it last month, I was immediately intrigued. I had never owned a fitness tracker or a smartwatch before, but the ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Add as a preferred ...

I compared Fitbit Air and Whoop MG sleep tracking over seven nights to see how closely the two agreed.

Wrist pulse oximeters can look similar, making it hard to decide which one to buy. This in-depth guide covers everything you need to know to find your best fit.

Explore my Withings Body Scan review after a month of testing. Discover who actually benefits most—and who should buy a ...