
Could The Quarter (400-Meter Run) Be The Best Fitness Metric For Longevity?
What if running one lap around the track could reveal more about your longevity potential than any other fitness test? The 400-meter run is known in track and field as the “race of truth,” challenging your fast-twitch and slow-twitch muscle fibers, aerobic and anaerobic energy systems, and your ability to maintain your technique as fatigue sets in. I revere it as the single best longevity marker known. In this episode, I explain why mainstream fitness programming emphasizes aerobic conditioning while often neglecting the speed, power, and explosiveness that decline much more rapidly with age. I also discuss research linking mile-run performance at age 50 with the potential to reach 80 in good health, and share my age-graded 400-meter chart, which lets you compare your time with performance standards for your age, all the way to 100. TIMESTAMPS: The nickname for the 400 meter run is the Race of Truth. That is one lap around the typical track. [01:01] For the first seven seonds you are running on stored phosphocreatine which is the energy stored directly inside the muscle cell that exhausts quickly. [03;24] Thje enxt phase is called anaerobic glycolysis that is burning sugar glycolysis without oxygen. [04:27] The 400 is an all out examination for all the energy systems, not just a very narrow sliver of your fitness capabilities [07:50] Humans are the greateast endurance creatures on earth. [10:24] Brad contends that tracking your performance in the 400 meters reveals more about fitness and longevity potential than any other fitness or even medical marker. [11:17] Brad explains how to analyze your performance on the chart on his website: "Age-Graded Longevity Performance Standards" [13:30] One can expect about a 6% decline per decade. [18:12] LINKS: Brad Kearns.com BradNutrition.com B.rad Whey Protein Superfuel - The Best Protein on The Planet! B.rad Superdrink – Hydrates 28% Faster than Water—Creatine-Charged Hydration for Next-Level Power, Focus, and Recovery NEW: B.rad Real Rad Gummies - Creatine + Nootropics for Focus, Motivation, Performance, and Recovery! Brad’s Shopping Page BornToWalkBook.com B.rad Podcast – All Episodes Peluva Five-Toe Minimalist Shoes Age-Graded Longevity Performance Standards We appreciate all feedback, and questions for Q&A shows, emailed to podcast@bradventures.com. If you have a moment, please share an episode you like with a quick text message, or leave a review on your podcast app. Thank you! Check out each of these companies because they are absolutely awesome or they wouldn’t occupy this revered space. Seriously, I won’t promote anything that I don't absolutely love and use in daily life: Recover Faster: B.rad Superfuel helps with fat loss, longevity, immune function and athletic performance with a potent combo of grassfed whey protein and creatine. A five-star bestseller on Amazon, or order direct and save! Get 20% OFF your first order with code BRAD20 Strengthen Your Feet: Peluva five-toe minimalist shoes naturally strengthen and realign your feet to perform better, relieve pain, and achieve full functionality. Use code BRADPODCAST for 10% off Online Education: Immersive learning to transform your diet in 21 days, endurance train the right way, prepare Paleo meals for the whole week, get started the right way the therapeutic cold exposure, and custom-design a morning movement routine. Slipstream Swim Machine: Smooth, adjustable, battery-powered swim current generator. Swim, or run, in place against a powerful current! Save $250 with the code BRAD @SlipstreamSwimMachine Somnus sleep system: An advanced, water-based mattress pad that uses intelligent, dual-zone temperature regulation to optimize your micro-climate for deeper, more restorative rest. Use code BRAD for $200 discount on SomnusLab.com Clean Your Indoor Air!: The Jaspr Air Scrubber is an ultra high-performance, automatic-sensor unit that will address the often-disregarded health concern of indoor air quality. Save $200 on your unit with code BRAD Explore B.rad Nutrition, online courses, and my favorite gear at: BradKearns.com/Shop Enjoying the podcast? Please leave a quick review on Apple Podcasts—it helps more people discover the show. Thanks for your support! #bradpodcast See omnystudio.com/listener for privacy information.


















