Learn the five clues that can tip you off to chronic fatigue and overtraining syndrome.
heart rate
Keep your finger on the pulse of your health—literally. Your resting heart rate may reveal way more than just how fit you are.
There are lots of numbers that can tell you a something about your health, but two of the most common are resting heart rate and blood pressure.
Whether you’re new to Fitbit or just to heart rate-enabled trackers, this insider’s guide will have you operating your Fitbit Alta HR like a pro.
Heart rate does more than just reflect stress and guide you through workouts. Now, it also helps Fitbit determine how much light, deep, and REM sleep you logged.
Maximum heart rate naturally declines with age. Here’s what that means for you and your running performance.
Former professional distance runner and Fitbit ambassador Ryan Hall is here to help new runners reach a big (but doable!) goal—running 26.2 miles!
Fitbit ambassador Ryan Hall shares how you can track your way to a new PR.
Your resting heart rate is worth paying attention to for a myriad of health reasons. Here’s what this little number can show you.
From alarm clock to morning run, here's Ryan Hall's rise and shine routine.