Calculating best HR for burning

[MrHull]

LONG ago on here i read about being able to calculate your heartrate, something like count how many beats in a minute, and there was a way of knowing how many bpm you needed to do to hit your best fat burning period but i forgot what it was because back then it didnt interest me that much, i looked for the post but it was so long ago my searches showed nothing... help?

 

[ihateschoolmt]

In school they told us to subtract your age from 220 and it should be 60-80% of that number.

 

[Mudge]

55-65% of max or thereabouts for an extended period of time.