HR zones 101 ↓ If you’ve ever tried calculating your HR zones, you’ve probably noticed something frustrating... Different methods can give you completely different zones. Let me break down the most common approaches: 1. Max HR Method (220 - age or similar formulas): - Zone 2 = 60-70% of max HR - Simple but often inaccurate - Doesn’t account for individual fitness levels 2. MAF Method (180 - age, then adjust): - Everything below MAF = “aerobic” - Popular but conservative for most runners - Can un