Your body is able to produce energy in two ways: aerobic and anaerobic metabolism. Aerobic metabolism is the energy system used 99 percent of the time. It’s how you produce energy when you are able to ...

Over the summer, a physiologist named Karlman Wasserman, formerly of UCLA, passed away at the age of 93. The name may not ring a bell, but you can consider your next threshold workout an unofficial ...

Who knew that two simple letters--an--could make all the difference in triathlon training? Frequently referenced, but often misunderstood, the difference between the terms aerobic and anaerobic seems ...

Some runners have funny ideas about the meaning of the word “anaerobic.” It’s not their fault, though, because even many exercise physiologists harbor an outdated understanding of aerobic and ...

Think about how you feel doing your 12-3-30 routine on the treadmill versus during a high-intensity interval (HIIT) class. You probably feel like you could maintain that first one for a pretty solid ...

As a runner, it’s helpful to know your lactate thresholds. And, yes, you read that right: thresholds. Plural. There is more than one lactate threshold that matters when it comes to pacing yourself and ...