If you're a lifelong powerlifter or bodybuilder, there's a good chance you're more concerned about growing your glutes, carving your core, or building your biceps than boosting your VO2 max. But for ...

For years, the gold standard for gauging workout intensity was often a simple "how you feel" metric. And while perceived exertion is still used by many exercisers and athletes today, it’s a bit like ...

Heart rate zones represent different percentages of your maximum heart rate. They can help guide the intensity and effectiveness of your workouts. The benefits of exercise are widespread and include ...

Regardless of the intensity of exercise you prefer, keeping a consistent routine can keep your heart healthy. Klaus Vedfelt/DigitalVision via Getty Images Aerobic exercise like jogging, biking, ...

Your physiology is beautifully unique. I sound like John Mayer if he was a physical therapist. Our bodies are wonderlands, ...

These days, everyone from the average Susan to the hardcore data-loving wellness enthusiast has the technology to track just about anything in the name of self-optimization. A ring wearable tells you ...

When Joe Driscoll toed the line at the U.S. Men's Olympic Marathon Trials in November, he knew that maintaining an even pace would be trickier than usual on the rolling hills of New York City's ...

You likely know the importance of zone 2 training—low-intensity miles that are the foundation of distance running plans. The challenge? Finding your personal zone 2 range, and sticking to it. That’s ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Zone 2 training is a type of cardio exercise where you use your heart rate as a guide to help you find the right intensity for your ...

Hunter Bennett does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Most professionals regard resting heart rate as a reliable measure of fitness. But when it comes to training, keeping your heart rate in specific “zones” is more important for building stamina and ...

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 ...