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 ...

Uncrowned is a new destination for all things MMA, boxing, wrestling, and more, featuring Ariel Helwani. The word aerobic literally means "with oxygen." When an athlete exercises in an aerobic zone, ...

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 It’s not their fault, though, because even many exercise physiologists harbor an outdated understanding of aerobic and ...

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. woman on a treadmill doing a lactate threshold test During intense or prolonged exercise, muscles can feel like they’re burning ...

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 ...