Knowledge Base

Polarized Training

The polarized training model has revolutionized the way many athletes train, from the elite ranks to the amateur levels. Dr. Stephen Seiler, a pioneer and leading researcher of polarized training in endurance sports, along with other renowned experts, explains how to master this effective training methodology.

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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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How to get started with polarized training. Coach Ryan Kohler with triathlete riding bikes.

How to Get Started with Polarized Training

You might have heard of polarized training, but do you know how to implement it in your training? We’re here to help you get started.

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The Making of a Triathlon World Champion title card

The Making of a Triathlon World Champion

What’s the story behind the rise and development of Olympic champion Kristian Blummenfelt—and what can other coaches learn from it? His coach Arild Tveiten shares his insight with Joe Friel.

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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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The Science Behind Going Slow to Be Fast

The concepts of central and peripheral conditioning help explain why an effective training base period leads to speed and durability in the race season.

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