A:Answer There is nothing about these bands that should interfere with a pace maker as they simply monitor your blood flow in your wrist and use clever algorithms to figure out things like effective heart rate, blood oxygen levels, etc. I wouldn't wear a chest HR monitor, however, without first asking your doctor -- it too is purely external and "just sits there" but the electronics in the sensor would be much closer to your pacemaker -- definitely a question for your cardiologist if you go this route! (I prefer the chest HR monitor for my workouts because it is a far more accurate device for strenuous workouts). The wrist HR devices (so far) work best for "steady motion" such as walking, jogging -- erratic motion (lifting weights, aggressive aerobics, etc. seem to cause a lot of misreadings).
