Whoop, the screenless watchband-like wearable, has just added a VO2max feature to its app. Now, just like Garmin, Apple Watch ...
Measured in milliseconds, a normal HRV for adults can range from below 20 to above 200, depending age, gender, and other ...
When you think about how fit you are, you might think about how far you can run or how many push-ups you can do. Or maybe you ...