Heart rate variability is now a common smart watch fitness stat. What does it mean for your exercise load?

As the popularity of smartwatches, also called wearables, increases, so too does the amount of data users can access about their health. Statistics like resting heart rate, V02 max (maximal oxygen consumption) and heart rate variability (HRV) provide valuable insight into your fitness levels. But not all measurements are created equal. While HRV has long…

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How Does the Fitness Device Work? Pricing, Deals

If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. Let’s be honest with each other: going to the gym is a lot of work. There’s the travel time (and if you live somewhere like NYC, there’s the added task of schlepping your…

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