Double Threshold workouts have changed endurance running since it became popularized years ago by pro runners, but what is it, who is it for, and should normal runners try it? I decided to take the risk and give it a shot to jump start my Boston Marathon training.

For 35 days, I trained like an Olympian — running double threshold workouts twice a week while balancing a full-time job, early mornings, long commutes, and the pressure of Boston just 90 days away.

Two workouts in one day.
Controlled intensity.
Strict recovery.

The idea behind double threshold is simple: accumulate more time just below lactate threshold to build a massive aerobic engine — without completely wrecking your recovery. It’s the system used by elite runners like Jakob Ingebrigtsen and other Norwegian athletes.

But here’s the real question:

Does this training method actually work for regular runners with real jobs, real schedules, and limited recovery time?

In this video, I break down:

What double threshold training actually is

How to design a double threshold day

How to measure whether it’s working

The science behind lactate threshold and recovery

The mental and physical toll of doing it as an amateur

And whether I’d recommend it for Boston Marathon prep

Along the way, I deal with exhaustion, guilt, early alarms, winter storms, treadmill workouts, and a 10K time trial that didn’t exactly go as planned.

Did this elite method build the aerobic base I needed?
Or did I dig myself into a hole I couldn’t recover from?

If you’re training for a marathon, half marathon, 10K, or just trying to get faster, this might be the most honest breakdown of double threshold you’ll see from a non-pro.

???? Let me know in the comments:
Would you try double threshold training?
Or is this something best left to the elites?