The Cardio sport is very susceptible to electronic interference. You can’t put you hand within 2 feet of the Control Panel of a Stairmaster for example or it stops working. Perhaps other brands use transmission techniques that are more immune.
|Low Alarm||Not that useful since on a Stairmaster or during an aerobics class there are deliberate cool down breaks. You can effectively turn it off by setting the low limit to 0. You don’t want to be beeping away when you are exercising with others. It might be more useful in cycling.|
|High Alarm||Is more useful since you are likely to be too involved in the exercise to be looking at the watch when you get up into that territory.|
|Watch||Having the monitor also act as a wristwatch might be a useful feature, say to time pauses between reps, or to keep an eye on closing time.|
|Autozone||Not an important feature. It is just as easy to enter the low and high alarm bounds as to have the watch compute them.|
|Percentage display||I like watching the percentage of maximum heart rate display. It is somewhat more meaningful that the raw heart rate, at least at first.|
The CardioSport people compute the MHR the same way. However, they suggest five different target zones, depending on your current level of fitness: 50 to 59%, 60 to 69%, 70 to 79%, 80 to 89%, 90 to 100%.
I discovered that my heart rates goes up as I tire, even when the actual amount of work I am doing stays the same. It also stays high for a while after a bout of vigorous exercise. I break into a sweat long before I get into the danger zone. The danger zone is quite a bit higher than I thought it would be. Bodies are not as fragile as I thought. It turns out it is safe to push myself quite a bit harder than I have been.
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