The CrossFit Podcast

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Here’s HOW High Intensity Protects the Parkinson’s Brain

June 23, 2026

In this episode of the CrossFit Podcast, host Jocelyn Rylee sits down with Michelle Hespeler and Dr. Sule Tinaz of Yale School of Medicine to explore the science and lived experience behind high-intensity exercise for Parkinson’s disease. Hespeler was diagnosed with Parkinson’s at age 40. A former physical education teacher, she began experimenting with structured, high-effort training long before exercise was widely discussed as part of Parkinson’s care. Tinaz is a neuroscientist and movemen...

THIS is why CrossFit Slows Aging With Dr. Jose Ostaiza (Hint: Epigenetics)

June 16, 2026

When CrossFit started, we didn’t need science to know it worked. We saw it in affiliates every day. People moved better, got stronger, and aged better. Now, the research is catching up. In this episode, physician, CrossFit Level 3 trainer, and researcher Jose Ostaiza explains how CrossFit changes the body at the molecular level through epigenetics, the science of how lifestyle influences gene expression. Ostaiza breaks down how high-intensity training rebuilds telomeres, supports mitochondria...

The Truth About Caffeine for CrossFit Athletes

June 02, 2026

Caffeine is the most widely used psychoactive substance in the world, and it is deeply embedded in fitness culture. Coffee, pre-workout, and energy drinks are often treated as essential tools for training and performance. But what does the science actually say? In this episode of the CrossFit Podcast, host Jocelyn Rylee sits down with sleep scientist and active duty Army neuroscientist Dr. Allison Brager to examine the relationship between caffeine, sleep, recovery, and performance. Brager ex...