In this episode, Dr. Tommy Wood returns to Barbell Shrugged for part two of a deep conversation on brain health, cognitive decline, and the daily habits that shape long-term mental performance. Joined by Doug Larson, Travis Mash, and Dr. Mike Lane, Tommy unpacks why oral health matters far more than most people realize, explaining how gum disease, oral bacteria, and chronic inflammation may contribute not only to cardiovascular disease but also to dementia risk. The crew also digs into the importance of sensory input, from hearing and vision to social interaction, and how losing those inputs over time can quietly accelerate cognitive decline.
The conversation then shifts into sleep, where Tommy breaks down what actually matters most for protecting the brain. Rather than obsessing over perfect sleep scores or chasing an arbitrary eight-hour target, he argues that the biggest levers are sleep opportunity, regularity, and avoiding behaviors that wreck sleep architecture. The group explores the different roles of REM and deep sleep, how sleep supports emotional processing, learning, and metabolic cleanup in the brain, and why wearables can be useful for trends without being trusted too literally. They also cover naps, alcohol, caffeine, common sleep aids, magnesium, chamomile, and why worrying too much about sleep can itself become part of the problem.
Finally, the episode broadens into brain risk and brain resilience in the modern world. Tommy highlights major risk factors for cognitive decline including hearing loss, high blood pressure, diabetes, smoking, obesity, alcohol, air pollution, and toxic exposures like lead and other environmental contaminants. He also gives a nuanced take on technology, arguing that video games, digital tools, and even AI can be either brain-supportive or brain-eroding depending on how they are used. When technology expands your capabilities, it can sharpen cognition. When it replaces thinking entirely, it can weaken the very skills you are trying to preserve. This episode is a practical roadmap for anyone who wants to think more clearly, age better, and protect their brain with smarter everyday decisions.
Links:
Doug Larson on InstagramCoach Travis Mash on Instagram
