Tips » Cardio and Aerobics
How do I figure out my target heart rate and what zone should I train in?
Here are a few methods for computing heart rate ...
http://www.naturalphysiques.com/tools.php?itemid=2
And a few articles that discuss the various zones:
http://www.naturalphysiques.com/cms/index.php?itemid=115
http://www.naturalphysiques.com/cms/index.php?itemid=4