Science Has Zeroed in on Why Lifters Need Cardio for Heart Health
Every gym (real gym) has a dude like this—we used to call them “fire plugs” (if you’re not from New York, that means fire hydrant). He has arms like sewer pipes, a chest like a gun safe, zero degrees of V-taper, and he’d probably be proud of the fact that he has a squat rack in his living room in case he needs some extra sets—your basic Midwestern corn-fed Jethro type. The exact guy you would never imagine seeing on a treadmill. Cardio? That’s what people do when they don’t have huge muscles to worry about. Besides, he can see his abs (ab, actually, but it’s like a rock). What more evidence of health could anybody possibly need? That depends on how long Jethro wants to live. A study recently published in Medicine & Science in Sports & Exercise looked at 562,234 adults who had undergone clinical treadmill testing. Researchers wanted to know whether measuring cardiorespiratory fitness improved predictions of who would die over the following decade, beyond the usual suspects: a...