Never detects heart rate

This product is great, IF you can get it to consistently detect your heart rate. First, if you buy the Garmin strap and have a small frame the strap won't work at all - it won't pick up your heart rate and is not snug even if pulled as tight as possible. The workaround to that is to use a Polar strap and cut the rubber around the sensors. This does the trip, most of the time. But I'd say at least half (if not more) of the time I look at the watch it just shows 3 lines on it - meaning it can't find my heart rate. So pretty much makes the watch completely useless. I've been using the watch for about 9 months now and although it worked ok for biking, it seems for cardio classes it just can not consistently detect my heart rate. My old Polar watch, although much less fancy, never had this issue. I am just about to consider junking this watch or selling it on ebay and buying a Polar watch as I hardly even wear the watch now since it's not accurate.

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