I pulled out my heart rate monitor yesterday. Now I have one more number to think about as I work out.
It is really interesting to see how my exertion affects my heart rate and what my rate stabilizes at. For example, today there was a point where my hr was just kind of sitting at 162 for a while.
When I first bought the monitor a couple years ago, I looked into heart rate ranges to see what my different ranges were for different levels of exercise. It was kind of helpful but I don't remember any of the specifics. I kind of remember the general idea though. In reality, I can gage pretty well what level of exertion I am at without it, and when I am wearing it I can use the numbers to monitor my exertion even more exactly. Some ranges I know about are 135ish is what I'm at when I'm riding my bike to the boathouse, 140-150 is warm up level, 160 is good cardio, 170 is probably near my AT (anaerobic threshold) and this is when I start to push it a little. I haven't gone all out with it on this time around, but I remember getting my heart rate over 190 when I was using it before. I think that the formula that get used a lot says that your max hr is 220 minus your age. So this would put me a little above 190. I think the percentages used for the ranges are percentages of this number, your max.
As I was surfing around looking up info on heart rate stuff I found this website, which has all kinds of interesting info. http://www.topendsports.com/ and the heart rate training range info is here http://www.topendsports.com/fitness/heartrate-range.htm
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