A few of the most important insights are heart rate variability (HRV), which describes the difference in time between the ...

Tracking your heart rate with a heart rate monitor (HRM) during your runs is one of the most powerful ways to optimize your training, whether you're a dedicated marathoner, power triathlete, or just ...

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 ...

These are independent reviews of the products mentioned, but TIME receives a commission when purchases are made through affiliate links at no additional cost to the purchaser. Heart rate is great for ...

Gym just got a little harder. — -- Students going back to school in Dubuque, Iowa, are going to find it a little harder to slack off in gym. Public middle and high school students will have to ...

You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test. The Polar H10 heart ...