But how do you know if you're getting the most out of your workout? An easy way to find out is by knowing your target heart rate. A normal resting heart rate is usually between 60 and 100 beats ...

and zone four is considered an all-out workout where you push yourself to the max. Besides heart rate, some devices can calculate heart rate variability. This measures your recovery or fatigue ...

Work out the cardiac output of a person at rest with a heart rate of 70 bpm and a stroke volume of 80 ml. Compare that to their cardiac output when they are taking part in exercise and their heart ...

It's all about hitting different heart rates, or the the number of times your ... Staying in your designated range will help you "get the most out of your activities," the American Cancer Society ...

This heart rate monitor doesn’t have a screen—you ... we wish you could view your data in real time while you work out. This ...

“Our physical fitness in the hot environment can certainly be improved through things like heat training,” says Chris J.

Exercising regularly is one of the best ways to keep your heart ... rate, the real test is low-tech, Paz said. "For the vast majority of people, you don't need any of this stuff. You just need to ...