Fitness monitor tells you when you're working too hard

Let's be honest: especially if you're out of shape, your first couple months of exercise won't exactly be pleasant. But if you're winded, sore and "feeling the burn," how do you know when you're pushing yourself too far (that is, before you pass out)?

Enter the MF-180. Not only is this exercise monitor far less cumbersome than a chest belt, but -- in addition to the normal array of information (like heart rate, calories burned, etc) -- also has an out-of-zone alert, so you know when you're working too hard.

So now you don't have to feel guilty every time you slow down and rest -- just wait for the beep, and you'll know you're doing the right thing for your body.