“HEART”Y stuff

VO2 max is the single most important predictor of longevity. And the best way to maximise it? A 25-minute workout that can make your heart 20 YEARS younger! (The 4×4 Norwegian protocol) 🧵 pic.twitter.com/kMmzSdpnxd — SammyArmstrong (@SammyRArmstrong) June...