The Five Heart Rate Zones

Zone% Max HREffortTraining Benefit
1 — Warm-Up50-60%Very easyRecovery, warm-up
2 — Fat Burn60-70%ComfortableEndurance base, fat oxidation
3 — Aerobic70-80%ModerateCardiovascular fitness
4 — Threshold80-90%HardSpeed, lactate threshold
5 — Maximum90-100%All-outPeak performance, VO2max

The Karvonen Method