# Maximum Predicted Heart Rate

#### Clinical Use

Calculate maximum predicted heart rate by age and maximum predicted heart rate achieved

#### Formulas

$MPHR\hspace{0.1cm}(Fox) = 220 \hspace{0.1cm}–\hspace{0.1cm}age$

$MPHR\hspace{0.1cm}(Tanaka) = 208\hspace{0.1cm}–\hspace{0.1cm}(0.7 \times age)$

$MPHR\hspace{0.1cm}(Stevens\hspace{0.1cm}Creek) = 205\hspace{0.1cm}–\hspace{0.1cm} \frac{age}{2}$

The equation by Fox is the quick and most commonly used equation to predict maximal heart rate.1

Tanaka’s equation (2001) was found to be more accurate to predict maximal heart rate in older adult.2

Fox’s and Stevens Creek’s3 equations were recommended to use for the purpose of training, testing, and daily exercise routine in military personnel.4

#### Definition

 HR Heart rate (beat/minute)

#### References

 1 Fox SM, 3rd, Naughton JP, Haskell WL. Physical activity and the prevention of coronary heart disease. Ann Clin Res. 1971;3:404–32. Abstract 2 Tanaka, Monahan, & Seals (2001). Age-predicted maximum heart rate revisited. Journal of the American College of Cardiology, 37, 153-156. Full text 3 Creek S : Target heart rate calculator. Available at http://www.steven screek.com/goodies/hr.shtml ; accessed September 29, 2010. Full text 4 Sporis G, Vucetic V, Jukic I, Omrcen D, et al. How reliable are the equations for predicting maximal heart rate values in military personnel? Mil Med. 2011 Mar;176(3):347-51. Link

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Developer & Illustrator: Sirikarn Napan, MD, FACC