The most accurate measure of your **Maximum Heart Rate** (**MHR**)
is to have a stress test performed by a trained professional.
Some fitness facilities can do this testing but your best choice would
be to consult your doctor about taking a stress test under medical
supervision.

This page will calculate your approximate
**MHR** from several different formulas based on gender, age, weight
and if known your **Resting Heart Rate** (**RHR**).
The first set of calculations use the basic formula for **MHR**.
Take the **Fetal Heart Rate** (**FHR**),
which is 220 for men and 226 for women,
and subtract your age:

MHR = FHR - ageThen you use standard percentage calculations to get the 60%, 70% and 80% values.

If you know your **RHR** the Karvonen Method is more accurate for
figuring **Target Heart Rate** (**THR**).
It uses the same basic **MHR** calculation but does a better job of
estimating an individual's **THR**s by using the **RHR** to
adjust the numbers.

80% THR = (MHR - RHR) * 0.8 + RHRTo discover your

The third calculation uses a formula developed by Dr. Dan Heil after studying
1500 walkers at the University of Massachusetts.
This formula calculates **MHR** using the additional factor of body weight.
For men only there is a constant value of 4.5 added to the final result.
The formula looks like this for men.
Leave off the addition of 4.5 for women:

211.415 - (0.5 * age) - (0.05 * weight in lbs) + 4.5Every individual is different. The results of all these

Exercising while your heart rate is between 60% and 80% of your
**MHR** is a good aerobic workout.
It's recommended for building up a solid fitness base and
burns fat that your body has stored rather than carbohydrates that you've
recently consumed.
A good aerobic workout between 60% and 80% of your **MHR**
should also leave you refreshed and invigorated instead of tired
and worn out.

Fill in the top section of the form and hit calculate to automatically fill in the bottom sections.

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