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# Thread: formula for calculating heart rate???

1. ## formula for calculating heart rate???

Alright, ive seen, plenty of times, people list a formular for calculating what your heart rate should be at when doing cardio.

200 - AGE * .7

My question is, are you all following order of mathematical operations when calculating this, or going left to right? For instance, im 21 yrs old so if I did it by order of operations
(200 - ( 21 * .7 )) = 185.3
And from left to right:
((200 - 21 ) * .7) = 125.3

Which one do you guys go by?

Thanks
-ost

2. (220 - age) * .7 = HR

3. That means for proper fat loss, my heart rate while doing 40min of cardio should be 125? That is extremely low in my opinion, how can anyone do 40min of cardio at such a sluggish pace. Most people can reach a heart rate that high just doin an exciting crossword puzzle

4. umm 220 - 21 = 199 * .7 = 139.3....

5. Female Member
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Originally Posted by OSTIE
That means for proper fat loss, my heart rate while doing 40min of cardio should be 125? That is extremely low in my opinion, how can anyone do 40min of cardio at such a sluggish pace. Most people can reach a heart rate that high just doin an exciting crossword puzzle
The formula is two hundred TWENTY minus age *.7 Your numbers were off. Although, 125 is still in the "fat burning zone," which is considered 60-70% max heart rate. And, although you won't need be running your balls off, it definitely takes more than a crossword puzzle to get there.

6. Originally Posted by Kim2884
The formula is two hundred TWENTY minus age *.7 Your numbers were off. Although, 125 is still in the "fat burning zone," which is considered 60-70% max heart rate. And, although you won't need be running your balls off, it definitely takes more than a crossword puzzle to get there.

kimmy said bals

7. Originally Posted by Elliot
kimmy said bals

thanks for the laugh bro

8. Female Member
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Location
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hehe...BALLS

9. Originally Posted by Kim2884
hehe...BALLS

i should proof read my threads.. wait that would take too much effort..

10. the complete one I know is
220- age - HR *.65-80 (depends of your age) + HR = 1(the 0.65)
= 2(the 0.80)
You shoud be between the two number.