Your Age:

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 × Age2]

177

Related training zones
Nonlinear equation — HRmax = 191.5 − (0.007 × Age2). 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]