The Five Heart Rate Zones
| Zone | % Max HR | Effort | Training Benefit |
|---|---|---|---|
| 1 — Warm-Up | 50-60% | Very easy | Recovery, warm-up |
| 2 — Fat Burn | 60-70% | Comfortable | Endurance base, fat oxidation |
| 3 — Aerobic | 70-80% | Moderate | Cardiovascular fitness |
| 4 — Threshold | 80-90% | Hard | Speed, lactate threshold |
| 5 — Maximum | 90-100% | All-out | Peak performance, VO2max |