Daniel Lieberman, a Harvard evolutionary biologist and expert in mismatch theory, joins the discussion to unveil what our ancient hunter-gatherer past can teach us about modern health. He stresses that exercise is the ultimate miracle drug and critiques the popular 10,000 steps guideline, revealing its marketing origins. Lieberman also challenges misconceptions around sleep and sitting, emphasizing the unique contexts of these activities. He advocates for incorporating strength training into our routines, urging a return to a more active, engaging lifestyle.