This is another good sign that you had a great workout, says Imani. Usually, you’ll feel hungry not long after training, as ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Knowing your sweat rate and sodium loss during a workout can help you customize your pre- and post-run fueling, as well as what you consume on the run. But until now, that’s been a bit of a guessing ...

You sweat, I sweat, everybody sweats. But everyone perspires differently — whether it’s the amount you produce or what comes out of your glands. The composition of your sweat can tell you a lot about ...

New Year’s resolutions always inspire me to revamp my fitness routine, and in 2026, I’m leveling up my workout gear by ...