Katelyn O’Brien is an expert in exercise and wellness, a certified holistic nutritionist, and customer service specialist. In this episode, Katelyn and Ethan discuss Spark: The Revolutionary New Science of Exercise and the Brain by John J. Ratey, M.D., and Eric Hagerman, which explores how aerobic exercise physically transforms the brain, improving mental health, cognitive function, and protecting against conditions like depression, ADD, addiction, and Alzheimer's.

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