Uncrowned is a new destination for all things MMA, boxing, wrestling, and more, featuring Ariel Helwani. Yahoo Racing is powered by Motorsport Network, providing expert reporting, analysis, and ...

As an avid runner, I’m no stranger to heart rate monitors and extra sensors. I’m all about getting every last little piece of data to figure out if I actually nailed my workout or if I pushed just a ...

When it comes to exercising, your heart rate is the gold-standard metric to uncover how hard you're pushing. It tells you whether you're working aerobically or anaerobically, how your body is reacting ...