The Endurance Lab

Publicly listed emails

jusman@theendurancelab.run

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She Finally Broke 3 Hours at Age 49 - Her Advice for Your Fastest Marathon After 40

October 09, 2026

At age 49, Marilyn Tarkalson ran a 2:58 marathon, breaking 3 hours after previously running 3:21 and 3:14. Now, at age 50, she’s still trying to get faster.In this conversation, we break down exactly what changed in Marilyn’s marathon training, nutrition, recovery and mindset. Whether you’re trying to run a sub-4 marathon, sub-3:30 marathon, qualify for Boston, break 3 hours, or simply run a faster marathon after 40, Marilyn’s progression offers a fascinating look at what it can take to keep ...

Run Elite Coach: Brutal Advice for A Sub-3 Hour Marathon After 40

October 02, 2026

How do you run a faster marathon after 40? Whether your goal is to break 4 hours, run a sub-3:30 marathon, qualify for Boston, or eventually run a sub-3 hour marathon, Andrew Snow argues that the answer may have far less to do with adding harder workouts—and far more to do with building the foundation required to support them.Andrew Snow is a running coach and author of Run Elite, a book that takes training principles used by elite runners and translates them for recreational athletes. In thi...

HRV Scientist: The NEW HRV Metric That Could Help Runners Over 40 Keep Improving

September 25, 2026

In this episode of The Endurance Lab, I sit down with Dr. Greg Grosicki, Staff Research Scientist at WHOOP, to explore the science of HRV and HRV-CV and, more importantly, how runners can actually use these metrics to make smarter training decisions.We break down why higher HRV is generally better while lower HRV-CV is generally better, why your seven-day HRV trend can tell you something very different from today's reading, and what different combinations of HRV and HRV-CV may reveal about re...

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How do I get in touch with The Endurance Lab?

The Endurance Lab is hosted by Jusman So. Its publicly listed email is jusman@theendurancelab.run. For guest bookings, the host or producer is usually the best person to reach. Podseeker helps you find direct host and producer contacts and pitch from your own inbox.

What is the email for The Endurance Lab?

The publicly listed email for The Endurance Lab: jusman@theendurancelab.run.

How many listeners does The Endurance Lab have?

Podseeker estimates The Endurance Lab reaches 100 to 1,000 listeners per episode. Only the publisher has exact numbers.

Who is an ideal guest for The Endurance Lab?

The Endurance Lab typically books industry leaders. Typical guest background: Published exercise physiologists, sports-nutrition and metabolism researchers, university faculty, specialist performance practitioners, and elite or accomplished endurance athletes with documented results. Common among recent guests: Peer-reviewed research and academic appointments; Leadership of specialist research or performance laboratories; Published position statements, professional presentations, or recognized clinical expertise. Recent guests include Aleksandr Sorokin, Aitor Viribay, and Kevin Miller.

How hard is it to get booked on The Endurance Lab?

Medium. Guests usually need solid credentials in the topic and an idea that fits the show.

What topics does The Endurance Lab cover?

Recent episodes cover Endurance Training, Sports Nutrition, Exercise Physiology, Running, and Recovery. Pitch an idea tied to one of these topics and mention a recent episode.