These are some pretty great tips...
I apparently need to get new shoes

I apparently need to get new shoes
So I don't actually monitor my heart rate. I have a monitor on my treadmill. according to this thing my heart rate should be in the 150's.
should I start monitoring it? Its usually pounding in my head and neck when I'm training but I never got that technical about it.
Prolly a dumb question but oh well.
exercising at 80-85% HR seems a little extravagant for a lot people to begin with, and to do a full work-out within that zone is going to give someone a heart attack. And you burn muscle when going above the zone? I've never heard of this before. Anyone know of any studies done on this topic?