Heart Rate Zone Calculator
This tool helps athletes identify training zones based on heart rate. It is essential for optimizing endurance, fat metabolism, and anaerobic capacity. You can enter either your age or your known maximum heart rate (HRmax).
🧪 What is Lactate?
Lactate builds up in your blood during intense effort. Training in different zones helps manage or improve how your body clears lactate. Zone 1–2 = low lactate. Zone 4–5 = threshold and overload for adaptation.
📊 What is RPE?
RPE (Rate of Perceived Exertion) is how hard an activity feels on a scale of 6 to 20. It’s helpful when heart rate tracking isn’t available.
📝 How to Use
- 🏃♂️ Zone 2: For long endurance sessions, fat metabolism & base building
- 🔥 Zone 3–4: For improving lactate threshold and race performance
- ⚡ Zone 5: For speed work, VO₂ max gains & peak intensity
- 🧘 Zone 1: Use for warm-ups, cooldowns, and recovery days