The following Mark's Daily Apple article was written by Mark Sisson,

and is narrated by Tina Lehman.

Take it easy, increase progress, how to make your training more primal.

I recently had the pleasure of interviewing my friend and business and training partner, Brad Kearns, for the upcoming Primal Endurance Online Digital Course. More about that later.

It was more of a discussion, really, and we kept coming back to the same three elements

for constructing any successful training program.

I'm going to present them as they came to me, as tangentially related thoughts.

Then I'll expand on them from there.

Without further ado, you don't really need to train the heart to beat faster.

The heart easily responds to exercise stress by elevating rate and stroke

volume. Even in an unfit person walking up the staircase, anyone who's ever had to speak in

public knows that your heart rate jumps to 150 beats per minute 10 minutes before it's your turn

with you doing anything overtly physical. The heart knows.

Of course, that doesn't mean you shouldn't do hard stuff.

You can train the heart to withstand greater demands,

and you can increase lung volume as well

by doing very specific, strategically placed high-intensity workouts,

sprints, intervals, tempo runs.

But when you train the heart hard, you do it sporadically,

not every day, not even more than once or twice a week. We used to think you trained the

heart at high heart rates every day, or several days in a row, to get the cardio part dialed in.

We now know what's more important is focusing on the biochemistry

...