Stephen Seiler, PhD

Stephen Seiler, PhD

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Exercise physiologist; posts endurance training science (polarized training, adaptations).

Wearables May Render Lab HR Max Tests Obsolete
SocialApr 21, 2026

Wearables May Render Lab HR Max Tests Obsolete

In the age of wearables and digital platforms, are one-off lab test based HR max determinations a thing of the past? https://t.co/1xTqyugldW

By Stephen Seiler, PhD
Survey: Endurance Athletes' Indoor Training and Ventilation Habits
SocialApr 1, 2026

Survey: Endurance Athletes' Indoor Training and Ventilation Habits

Spring is here for many. Endurance athletes, have you said goodbye to sweaty indoor treadmill/ergometer sessions, or are they still part of the mix? This short survey asks questions about training indoors, including about ventilation challenges: ...

By Stephen Seiler, PhD
Intense Training Costs My Heart, Fuels Scientific Insight
SocialMar 28, 2026

Intense Training Costs My Heart, Fuels Scientific Insight

For nearly 40 years I've used my body to test ideas about training intensity, HIIT, monitoring, etc. I seem to be paying for those sins now with big atrial fibrillation challenges. This distracts me a bit, but hey,...

By Stephen Seiler, PhD
Traditional Periodization Remains Core to Modern Sports
SocialMar 28, 2026

Traditional Periodization Remains Core to Modern Sports

Ever since I travelled to Moscow in 1986 as a 20y old student in search of secrets, "periodization models" have spun in my head. This review helped slow the spin. Revisiting Tradition: Why the Traditional Periodization Still Shapes Modern Sport...

By Stephen Seiler, PhD