Health
posted by Leslie .
Ken's target heart rate is 122139bpm. His resting heart rate is 73 bpm. What is his age?

Since this is not my area of expertise, I searched Google under the key words "optimal exercise heart rate formula" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=optimal+exercise+heart+rate+formula&ie=UTF8&oe=UTF8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
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