What should my heart rate be?

[Pie4me]

I was wondering if someone could help me figure out
what my heart rate should be while I am walking/running.
I am a 51 year young female and I want to exercise
in my target heart rate but don't really understand
how to find it.

I think I am pushing it and getting way out of
breath too soon. If I am going to take the time
to exercise each day I want to be doing it
right and maybe even buying myself a heart
rate monitor. Can someone explain it to me
and help me understand it and what mine would
be? Thanks so much friends!

[liv]

You need to establish your resting heart rate and then do some calculations. There are several web calculators around.
You could try this one
Interactive Tool: What Is Your Target Heart Rate?

[Georgiana]

Here's a heart rate calculator (enter your age and rest heart rate and then click Calculate):
Target Zone Calculator for heart rate monitors

and here's a chart: