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Library members get access to the Fast Talk Laboratories video library including how-to, training analysis, technique, recorded Q&A sessions, and workout videos from our coaches.

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Videos > Polarized Training

The Stephen & Siren Seiler Series: My Daughter’s Long Road Back to Health

We know him as a sports scientist, but he’s also a father and coach. In this eight-part video series, we see Dr. Stephen Seiler in all three roles as he talks candidly with his daughter Siren about her return to training after struggling with an eating disorder and RED-s.

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External Load vs. Internal Response

External Load vs. Internal Response

Load, stress, strain—they’re terms we hear a lot in sports science, but what do they mean? Dr. Stephen Seiler explores how your internal response to external load will change as you become fitter and more durable.

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exercise intensity distribution in the Polarized Training Method

How to Measure Intensity Distribution

Is 80/20 really the best mix of intensities? And what’s the best way to categorize training? Dr. Seiler has a simple method to get you started.

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science vs. practice

Polarized Training Science vs. Practice

Scientists have worked closely with athletes and coaches to define the polarized model and explain how it works. Who leads the way? Dr. Seiler talks about the scientific process playing out in valuable ways in both research and the real world.

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overreaching polarized training

How Polarized Training Can Save You From Overreaching

It can be very easy to train at a moderate intensity all the time, which can be a surefire way to land in an overreached state. Polarized training can help prevent that—and in this video, Dr. Seiler explains how.

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Polarized training guide

Polarize Your Training Stress

Dr. Stephen Seiler explains why polarized training is a winning strategy for the long game of endurance sports. By balancing the stress of training, athletes see bigger gains over time.

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Siren Seiler Dr. Stephen Seiler

If Dr. Stephen Seiler Were Your Dad, How Would You Train? Part 1

If your dad were a world-class exercise physiologist like, say, Dr. Stephen Seiler, how would you train? Probably pretty effectively. In this case study of one, Dr. Seiler chats with his daughter and runner, Siren, to review her career and training methods.

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