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

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 mitochondrial health, reduces inflammation, and slows biological aging. By combining strength, cardio, and high-intensity work, CrossFit produces deeper and broader adaptations than single-mode fitness. This conversation offers a look inside the black box and explains why CrossFit is not just effective, but uniquely powerful for long-term health and longevity. Topics Covered Epigenetics and how lifestyle controls gene expression Why high-intensity training drives change at the DNA level Biological age versus chronological age Exercise, nutrition, stress, sleep, and social connection as longevity tools Bridging medicine, research, and the CrossFit affiliate Community Highlight Tony Espejo spent 21 years as a police officer in Omaha, Nebraska, after serving in the Marine Corps. When he came home, the neighborhood where he grew up was changing fast. Gang violence was taking over streets that once felt safe. Tony did not walk away. He remembered what kept him grounded as a kid. Sports. Accessible, affordable, and rooted in community. In 2004, he started a free soccer league for kids from rival neighborhoods. Six teams grew into more than a hundred. Over time, violence in South Omaha dropped. At the center of everything Tony built was CrossFit. It became the foundation for developing stronger, faster, more confident kids. Those who trained consistently stood taller — on the field and in life. In 2016, he opened Kinship CrossFit to give kids who did not connect with traditional sports, and their parents, a place to train together. Today, Tony is rebuilding his affiliate from the ground up. If you are a nonprofit affiliate working with kids, reach out. Tony would love to connect.