Tanaka (2001) + Karvonen (1957) Heart Rate Reserve Zone 2 Calculator
Powered by the Struggl Autonomic HRR Zone Subsystem. Computes HRmax = round(208 - 0.7 * Age) and Zone 2 = round(HRrest + [0.60..0.70] * (HRmax - HRrest)).
- 30 yo Athlete (RHR 48 bpm): Tanaka HRmax = 187 bpm -> Karvonen Zone 2 = 131-145 bpm (vs 114-133 bpm with naive 220-Age; +17 bpm floor correction).
- 35 yo Athlete (RHR 52 bpm): Tanaka HRmax = 184 bpm -> Karvonen Zone 2 = 131-144 bpm (vs 111-130 bpm with naive 220-Age; +20 bpm floor correction).
- 45 yo Athlete (RHR 54 bpm): Tanaka HRmax = 176 bpm -> Karvonen Zone 2 = 127-139 bpm (vs 105-122 bpm with naive 220-Age; +22 bpm floor correction).
| Component | Deterministic Specification & Literature Benchmark |
|---|---|
| Rule / Benchmark 01 | 30 yo Athlete (RHR 48 bpm): Tanaka HRmax = 187 bpm -> Karvonen Zone 2 = 131-145 bpm (vs 114-133 bpm with naive 220-Age; +17 bpm floor correction). |
| Rule / Benchmark 02 | 35 yo Athlete (RHR 52 bpm): Tanaka HRmax = 184 bpm -> Karvonen Zone 2 = 131-144 bpm (vs 111-130 bpm with naive 220-Age; +20 bpm floor correction). |
| Rule / Benchmark 03 | 45 yo Athlete (RHR 54 bpm): Tanaka HRmax = 176 bpm -> Karvonen Zone 2 = 127-139 bpm (vs 105-122 bpm with naive 220-Age; +22 bpm floor correction). |
Verified Scientific DOIs: 10.1016/S0735-1097(00)01054-8, PMID:13470504