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Is the Testosterone Crisis Real? The Numbers Behind the Headlines | Signal Ep 1
Episode 394
Every week there's a new headline saying men are losing testosterone. A quarter of men now start testosterone replacement therapy without ever gettin…
5 months ago
Medical Mystery: The Man Who Got Weaker When He Started Training
Episode 393
A 43-year-old man starts exercising and ends up in the ER with a CK over 100x the upper limit of normal. His doctor says it’s from training. We don’t…
5 months, 1 week ago
Overtraining Syndrome: Causes, Diagnosis, and What's Actually Going On
Episode 392
In 2022, researchers conducted the most rigorous systematic review ever performed on overtraining syndrome — looking specifically for controlled stud…
5 months, 2 weeks ago
Episode #391: VO2 Max vs. Cardiorespiratory Fitness, GLP-1 Costs, and the 10,000-Step Myth | Direct Line March 2026 (Free)
In this free preview of the March 2026 Direct Line AMA. Drs. Feigenbaum and Baraki cover: VO2 max versus cardiorespiratory fitness for longevity (are…
5 months, 3 weeks ago
Episode #390: Why Your Waist Matters More Than Your Weight — The Science of Visceral Fat
You can have a completely normal BMI and be on your way to cardiovascular disease, type 2 diabetes, and metabolic syndrome without triggering a singl…
6 months ago
Episode #389: Your Liver Enzymes Are Elevated — But It Might Not Be Your Liver
A fit, healthy 39-year-old was nearly sent for a liver biopsy. The cause? Was it that he went to the gym before every blood draw or because his suppl…
6 months, 1 week ago
Episode #388: Muscle Imbalances, Red Meat Risk, and the Science of Body Fat Set Points
In this special preview of the Barbell Medicine Plus Direct Line, Dr. Jordan Feigenbaum and Dr. Austin Baraki move past the fitness basics to tackle …
6 months, 3 weeks ago
Episode #387: The Valsalva Maneuver- Blood Pressure & Safety in Lifting
Most doctors, trainers, and "safety-first" influencers warn that holding your breath while lifting is a dangerous habit that could lead to a stroke o…
6 months, 4 weeks ago
Episode #386: Longevity Myths- Biological Clocks, GLP-1 Muscle Loss, and What Actually Predicts Lifespan
The longevity industry is now worth over $100 billion per year. From DNA methylation clocks to multi-cancer blood tests and GLP-1 medications, the pr…
7 months ago
How-To Fix Your Stalled Progress (Strength Edition)
Lifting more weight doesn't always mean you've gotten stronger. In this foundational session, Dr. Jordan Feigenbaum and Dr. Austin Baraki introduce t…
7 months, 1 week ago