Heart Rate and Power Training Zones
Enter either field or both. Results update as you type. These estimates retain the original OTB calculator’s formulas.
Review the field test information.
LTHR: —
Estimated FTP: —
| HR Zone / Power Level | Watts | Heart Rate | RPE | Description |
|---|---|---|---|---|
| 1 | — | — | 1–2 | Recovery |
| 2 | — | — | 3–4 | Endurance |
| 3 | — | — | 5–6 | Tempo |
| 4 | — | — | 7 | Lactate Threshold |
| 5 | — | — | 8 | Above Threshold |
| 6 | — | — | 9 | Aerobic Capacity |
| 7 | — | — | 10 | Anaerobic Capacity |
FTP is estimated as 95% of the entered 20-minute power. Heart-rate zones use the entered heart rate directly. Zone percentages and rounding match the previous calculator, including power level 7 starting at 160% of FTP. Use these field-test estimates alongside individualized testing and coaching guidance.