High-intensity workouts get most of the attention. But the real secret to making those sessions productive is the aerobic base underneath them. A stronger...

Some workouts leave you buzzing. Music loud. Heart racing. Sweat pouring. They feel productive because they’re exciting and intense. But feeling amped up...

Sports, skill training, and high-intensity group workouts can all elevate heart rate and feel demanding.  But relying only on these for your weekly training...

Not all training stresses the cardiovascular system in the same way. A long aerobic session and a heavy strength workout can both be “hard” — but they chal...

Not all training stresses the heart the same way.  Steady aerobic cardio, high-intensity intervals, strength training, and mixed modalities like sled pushes...

Many workouts leave you breathing hard, sweating, and feeling exhausted. Because of that, it’s easy to assume they must be improving your cardiovascular fi...

Circuit training is often labeled as “cardio.” Your heart rate stays high.  You’re breathing hard.  You’re sweating.  It feels similar to a conditioning wo...

Many activities make your heart rate go up.  You breathe harder.  You sweat.  You feel tired. It’s easy to assume all of that equals cardiovascular trainin...

Many people judge their fitness by how out of breath they feel during exercise.  Others focus on how quickly their muscles fatigue. These are related, but ...

Many people assume that if their heart rate is elevated for long periods during an activity, they must be getting a strong “cardio” benefit. This is espe...