Is Zone 2 Cardio OVERRATED for Strength Training Over 40?

Do you need 3 hours of Zone 2 cardio a week if you're already strength training over 40? You've heard that Zone 2 builds your mitochondria, burns more fat, and adds years to your life, as long as you put in about 3 hours a week. I put those claims under the microscope and compare Zone 2 with harder cardio, with a focus on what you need when you already lift and don't have hours to spare. You'll learn: Who Zone 2 was originally built for, and why that matters if you liftHow much to trust the h...