Stop the calorie counting feature or just take the thing off as soon as you stop doing your cardio (Zumba etc). You should not use a HRM during weight lifting / strength training activities as the numbers will be wildly high.
I used to wear a HRM during weight lifting and it told me that I was burning 900 calories in an hour as a 150 lb female. In reality it was probably closer to 180 calories.
So many people make this mistake and overeat as a result. BIG mistake.
Burning over 600 calories in 1 hour will have most people working out fairly hard. And figures of 800 and above require a pretty serious level of fitness to sustain for 1 hour. 1320 in 1 hour just isn't feasible.
A couple of possibilities here.
Firstly, some HRM's default to a weight based on kilograms (1 kg = 2.2 lbs). So entering your weight in lbs can lead to a massive overestimation of calories burned. You may want to check your HRM;s settings.
Secondly, some medications or high blood pressure can lead to an accelerated heart rate above what the exercise actually justifies. Did your HRM report your average heart rate over that 1 hr.
Also, HRM's are calibrated for cardio activity. They will not produce accurate results for strength training, which is ANaerobic rather than aerobic activity.
You don't perhaps have it set that you're a male when you're actually female do you?
Fitness Minutes: (4,773)
88 2/27/13 10:08 P
I can tell you right now that is absolutely right now. For most people an hour of Zumba is going to burn roughly 400 calories depending on how much you get into it. I do a lot of Les Mill classes and they're basically like Zumba - and even Attack which is considered the highest burning calorie class you can take still only comes out to 600-800 calories in an hour depending on if you're during high/low impact options. I do understand you said you are on the heavier side - but I still don't see you burning 3x that many calories. HRMs can be wrong sometimes from what I read - personally I don't use one. And its always been a philosphy of mine its better to underestimate calories burnt than overestimate.
Fitness Minutes: (3,131)
145 2/27/13 9:57 P
Hi guys, I have recently started working out hard...and it's working, but some of the numbers my heart-rate monitor are spitting back out surprise me. I worked out for an hour of fast paced zumba today, with a warm up and cool down, then some weight lifting, and it said I burned 1320 calories. I know that because I am so heavy it should be easy for me to burn more calories per workout...right? Still, those numbers seem high,especially since that's as much as I'm eating some days (though I try to eat more when I use my heart-rate monitor and see that I've burned so many.) Thanks guys! PS. It is a chest-strap to wrist receiver monitor made by Bowflex.
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