Which of the following formulas determines your estimated maximum heart rate? a. 220 - your age b. 220 + your age c. 200 - your age d. 200 + your age

To determine your estimated maximum heart rate, the formula would be;

 A. 220 - your age

So, for example; if your age 30, and you want to find your maximum heart rate, you must use the formula; 220 - 30 = 190.

Keep in mind that this formula only gives you a roughly estimated maximum heart rate, and you should not reach, or exceed this number. It is neither safe, nor healthy. 

Good luck!

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