Equation 1 220 - Age |
175 Related training zones | The original formula, later found to have a fairly large standard deviation. |
Equation 2 210-[.5 x Age] |
187 Related training zones | One of the first modifications to the original formula |
Equation 3 Male Adjusted 202-[.55 x Age] |
177 Related training zones | Male (Gender Adjusted) |
Equation 4 Female Adjusted 216-[1.09 x Age] |
166 Related training zones | Female (Gender Adjusted) |
Equation 5 205.8−[0.685 × Age] |
174 Related training zones | The formula deemed least objectionable. This was found to have a standard deviation that, although large (6.4 bpm), was still considered to be acceptable for the use of prescribing exercise training HR ranges. |
Equation 6 191.5 − [0.007 × Age^{2}] |
177 Related training zones | Nonlinear equation — HRmax = 191.5 − (0.007 × Age^{2}). this has the tightest range of ±2–5 bpm |
Equation 7 Women - 206 − [0.88 × Age] |
166 Related training zones | The 2010 research conducted at Northwestern University revised the maximum heart rate formula for women. According to Martha Gulati, et al., it is: HRmax = 206 − (0.88 × Age)[9][10] |