Originally Posted by
tjkoko
You need to google the term
target heart rate. It gives you a round number to shoot for when working out. Again, I stated round number.
It's bunk, it merely perpetuates the inaccurate belief that max HR is broadly consistent between individuals and varies consistently with age. That's nonsense. If I went by those "round numbers" I'd be assuming I was working hard when in fact I'm about 20bpm below my lactate threshold.
The only way to know what "target heart rate" is for training purposes is to test for it - either max HR or, more usefully, LTHR - and then base your training zones on your results, not on some bogus formula.