Shane Parsons on Instagram: "Sub 130 HR hitting different for beginners! If you’re just starting your running journey - say, 3 months of consistent 2x weekly runs - those generic HR formulas (220 minus age) are gonna set you up for a rough time. You’ve probably heard about “easy running” and checked your watch, only to find your HR is way higher than the numbers suggest it should be. Sound familiar? Here’s the reality: that zone 2 number they’re giving you? Nearly impossible to hit without basic