Dr. Andy Galpin

Performance, fatigue, like depending on which spectrum you're in here, people will call these different things.

Load management, there are performance-based ones.

These ones you've all mentioned are in the respiratory physiology side.

So that's great.

We'll just stick right there.

Now, HRV is one of them.

Resting heart rate's another.

More commonly, though, that we use are respiratory rate.

And then you can look at something like CO2 tolerance.

Let's just disregard those for now.

We'll focus on respiratory rate.

We'll focus on HRV and heart rate.

Resting heart rate is a good sign if conditions are stable.

If your resting heart rate becomes elevated at probably more than three to five beats per minute for more than a couple of days, that is a good sign something is happening.

In this case, not a good thing, right?

So it's starting to become elevated, as you said earlier, generally indicates you're getting overcooked, right?

Too much training or allostatic load, total stress, like something.

Not enough recovery.

Not enough recovery, calories, something's going on there.

The issue with that is resting heart rate is incredibly unsensitive, right?