VO₂ Max: The Fitness Number That Could Change How You Age

What if one of the most important indicators of your long-term health is a number you've never measured? It's called VO₂ max, and it tells us a lot about our aerobic fitness, endurance, and capacity to stay active as we age. In this episode of the Redefine What's Possible podcast, Shanon Tysland sits down with exercise physiologist, endurance athlete, and author Brady Holmer to explore why VO₂ max matters—not just for elite athletes, but for anyone who wants to perform better today and stay healthy for decades to come. They unpack the science connecting aerobic fitness and longevity, what VO₂ max scores actually mean, how testing can guide training, and why high-intensity intervals may be one of the most effective ways to improve your aerobic engine. Whether you're chasing a personal best, training for your next adventure, or simply wanting to keep up with your kids and grandkids, this conversation offers practical insights for building lifelong fitness. Because fitness isn't just about what you can do today. It's about what you'll be able to do tomorrow. Some of the key themes we explore: VO₂ max explained: What it measures and how the heart, lungs, blood vessels, and muscles work together to produce energy. Elite performance vs. everyday fitness: Why having the highest VO₂ max doesn't necessarily mean winning the race. VO₂ max and longevity: The research connecting aerobic fitness with all-cause mortality and staying capable as we age. Understanding your number: What scores of 30, 40, and 50 mean and why age and sex matter. Training zones simplified: Easy, moderate, and hard—and why training doesn't need to be overly complicated. Testing and training smarter: What laboratory testing, wearables, and ventilatory thresholds (VT1 and VT2) can tell us. Improving VO₂ max: Zone 2, high-intensity intervals, and why longer intervals may be especially effective. Recovery and adaptation: The importance of sleep, nutrition, and mental recovery. Redefining what's possible: How Brady approaches aging, performance, family, and remaining competitive throughout life. Keep Up With Brady Newsletter: https://www.physiologicallyspeaking.com Podcast: Run Long Run Healthy Book: VO2 Max Essentials (available on Amazon) X: @Brady_H