Peter and Aubrey work through a list of fitness and health myths — everything from whether your pee needs to be clear to whether cold plunges do anything besides make you cold. Peter, a physician who actually researched every item beforehand, delivers verdicts with increasing exasperation at the wellness-industrial complex. The episode gets off to a chaotic start when Aubrey's city issues a tornado warning mid-recording, which they handle with an extremely relaxed amount of concern.

SHOW NOTES

• Unplanned cold open: A tornado warning interrupts the recording right before Aubrey introduces the topic — complete with sirens, an emergency alert, and Peter calmly browsing tornadohq.com while Aubrey checks whether the sky is green.
• The episode's framing: Aubrey compiled a list of fitness myths she wanted Peter to address; Peter researched each one before recording to make sure his gut answers were correct. (They were.) The through-line is the firehose of fitness misinformation on social media versus the relative rigor of older media.
• Hydration myths — two myths addressed: No, you don't need to hit a specific daily ounce target (it varies wildly by body size, activity, and weather); and no, your urine does not need to be clear — pale yellow is the actual target. Peter notes that clear urine can actually indicate overhydration.
• Caffeine and dehydration: Totally debunked. Caffeine is a very weak diuretic, and you'd need 500–600mg to see any meaningful effect — well above a normal cup of coffee or tea.
• The 10,000 steps myth: The number came from a 1965 Japanese pedometer called the Manpo-kei ("10,000 steps meter") — a marketing name, not a medical recommendation. Research suggests meaningful health benefits plateau around 6,000–8,000 steps, and the biggest gains come from going from ~2,000 to ~5,000.
• "Breakfast is the most important meal of the day": A cereal company marketing line from the 1980s, not medical advice. Peter's verdict: if you like breakfast, eat it; if you don't, don't. There's no metabolic magic to eating first thing.
• Electrolytes for regular exercisers: Save your money. Electrolyte replenishment only becomes relevant after roughly four hours of continuous exercise. For everyone else, you're just making your urine more expensive.
• Zone 2 cardio and fat burn vs. fat loss: A nuanced one — Zone 2 does preferentially burn fat during exercise, but that doesn't translate to greater fat loss overall. What happens in the other ~10,000 minutes of the week matters far more than what happens during 150–300 minutes of cardio.
• Cold plunges: Peter is unimpressed. No meaningful physiological benefit for most people; may actually inhibit muscle protein synthesis after resistance training. Heat is better post-lift.
• Detoxes and cleanses: The one that makes Peter visibly angry. Your liver, kidneys, GI tract, and lungs already do this — it's literally their job. No juice cleanse replaces a failing organ, and anyone selling you one has something to profit from.
• Carbs, protein, and the "no eating after 6 pm" rule: All myths. Carbs are your brain and body's primary fuel source; processed carbs are the problem, not carbs generally. Protein needs are real but far lower than supplement companies suggest (~0.82g per pound of bodyweight). Meal timing within a 24-hour window doesn't affect fat storage.