The following Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Lehman.

Seven subjective longevity markers to track and fix.

A few weeks ago, I went over seven of the most important longevity biomarkers to track.

Today, I'm shifting gears a bit.

The theme remains longevity markers, but the markers I'll discuss today are subjective, logistical, and psychological ones.

A couple involve physical sense,

but you can't measure these with a blood draw or a lab scan. The only way to assess your standing is through some genuine self-experiment and honest soul searching, or by, in one

case, running a mile. So as you listen to today's list, keep that in mind,

where do you stand, truly?

Do any of these apply to you?

Number of years aside,

what do you really want your longevity gains to look like, feel like?

What changes are you willing to commit to now

that will make this a more probable reality?

Here are a few markers to start with.

Number one, a mile run at age 50.

I've extolled the virtues of the mile run before.

It's a nice blend of stamina and intensity.

It's over quickly, ideally in less than 10 minutes, so you won't accumulate damage associated with longer runs at similar intensities.

And research shows that your mile run time at age 50 is a good barometer for your heart health.

Since it's right around middle age that heart disease becomes a real issue, if you can go into your twilight years with a decent

mile run and the confidence that your heart works well, that's a big advantage. If you're a man

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