Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness ...

But it turns out more subtle color changes occur at rest as the heart pumps blood around the body. The ebb and flow of blood ...

Get to know the link between your effort level and your heart rate. Plus, how to use heart rate to your performance advantage ...

Health-tracking tech has never been more accessible, or more intrusive. Here are the pros and cons of data overload.

Good news for coffee drinkers—starting your day with a cup of joe may provide benefits beyond an energy boost.

The Need for Cardiopulmonary Exercise Testing Cardiopulmonary exercise tests are crucial in evaluating the heart and lung function of individuals engaged in intense physical activity. The tests ...