New research from Australia overturns the old idea that exercise “uses up” heartbeats. It shows that fitter people actually use fewer total heartbeats each day thanks to their lower resting heart ...

You glance at your heart rate monitor during a tough run and an unusually high number jumps out at you. Should you be excited or concerned?

Despite how vital it is to our existence, most of us rarely think about our heartbeat until, say, a surge of adrenaline causes it to flutter in our chest. Beats are also faster in moments of stress or ...

Question: I have had lots of cardiac tests lately which came back clear – but I notice that my resting heart rate is going up. I am in my 40s and female and I was wondering if I need to get more tests ...

Exercise makes us happier, fitter, stronger and more energetic. But while many people still don’t reach the minimum ...

This story is from Manual, GQ’s flagship newsletter offering useful advice on style, health, and more, four days a week. Sign up here to get it in your inbox. Ever since the first FitBit was released ...