How do you know when your workout is actually torching the excess energy your body's stored up as fat? Here's a simple ...

Fitness gadgets and apps (and books and other sources of fitness advice) try to skip that step by using a formula that estimates your maximum heart rate based on your age. The most popular formula ...

Our editors also may be in touch with follow-up questions. An elevated heart rate as a result of physical activity, such as going for a run, is common, but what should your heart rate look like at ...

Heart Rate x Stroke Volume = Cardiac Output ... This will give the correct formula. If you want SV, cover SV with your finger and you are left with CO/HR.

Zone 1 (55-65% of max heart rate): This is the "conversational pace" zone. You work at a light intensity, so you can easily chat without losing your breath. This pace is ideal for burning fat and is ...