How many calories do you burn working out for a hour

It depends on your age, weight, fitness levels etc but I can burn 400 cals in 30mins on the elliptical trainer with an av HR of around 140 (5' 6", 41y-o female and 219lbs).

Here's a website I use to calculate calories burned when I'm wearing my spare HRM that doesn't provide me the information automatically:

http://www.shapesense.com/fitness-exercise/calculators/heart-rate-based-calorie-burn-calculator.aspx

Put in your numbers and see what you get...remember, there is a difference between "gross" burn and "net" burn.

Assuming the HRM is calculated. Are you wearing a chest strap also? I burn over a Thous cal/hr with an HRM/chest strap. My RHR is 50. Good job getting back into the game of it all

Yes it's possible.
I've just done 75 minutes of interval training on a Spinning bike and burned 936 (Polar FT7) so that's a rate of 749/hour.
My current maximum I could record would be about 800/hour flat out.

Beware that like everything it's an approximation - you can't really count calories by heartbeats, it's just an algorithm comparing age/sex/weight against a set of standard results.
When I was less fit and hit higher heart rates I once recorded 900/hour but in reality my actual power output and endurance is better now.

I've used the numbers given by my HRM to eat back calories "earned" and it's worked out OK for me - just be prepared to make adjustments based on your actual weight loss results if required.

Cross reference it with an online calculator for the activity. Cal burns on HRM are usually over-estimated. In the last link is some info on HR zones and training

http://www.shapesense.com/fitness-exercise/calculators/

http://www.healthstatus.com/calculate/cbc

http://walking.about.com/cs/fitnesswalking/a/hearttraining_2.htm

HRMs are not accurate. If you're doing steady state cardio, they are somewhat accurate, but if you are doing anything else, they aren't accurate at all, because they are only designed for steady state cardio, and don't have calculation formulas for anything else.

I have a Bodymedia Fit.... I consistently burn about 500 cal per hour on the elliptical when I do higher intensity days. The machine of course will have me believe that I burned 680, and MFP tells me 800+. I of course rely on the armband to tell me the truth. The bad thing is those armbands to not count the calories for weight training...so I am constantly under my numbers on MFP. Truth be told, my 2 hour workouts are around 700 cals burned give or take 50. I am 5'2" female 186lbs 30% body fat. :bigsmile:

That sounds a little high for me, but not completely implausible as an estimate. My Garmin Edge 800 cycle computer with HRM calculates that I burn around 680-720 calories an hour at an average heart rate of 150-155 (78-81% of my maximum), mostly steady state. I'm 5' 10" and weigh 168 lbs. at present. The Edge factors in bike speed and the road grade (climbing, flat, descending) as well as heart rate, though it can't account for wind resistance.

When I'm burning an estimated 700 calories an hour, I'm sweating fairly constantly and feeling like 7-8 on the Borg RPE scale (10-point version).

Cool well that makes me feel better that the Heart Rate Monitor isn't broke. I'm just 5'10 and 155. I used to run a lot and got up to a half in about 1 hr and 50 mins but that was a year ago when I could run. I guess I'm in better shape than I thought I was!

Unfortunately at your height and weight it is almost certainly wrong, though it is *POSSIBLE*, you'd be a very high level athlete running or climbing hills for that burn and with your recent injury, almost certainly its wrong.

HRMs do a horrible job measuring burnt calories if its not steady state aerobic exercise over a long term, and they dont subtract what you are already counting that you picked in activity level (a portion of the measured burn/hr is what you'd burn anyways sitting on your butt). If you are doing various activities, or worst yet weight training, it will be very high typically (or low if contact is broken). The 800+ range is much more probable for taller guys over 230lbs like me, but I have to work my butt off to get my 900/hr rate and I still think it is high for me after doing an analysis over time.

EDIT -- I just reread this: " it said that I burned 826 with an average heart rate of 157 bpm and in the range 125 to 165 bpm for 35 mins" I was assuming this was a one hour burn. It is impossible for you to burn this much in 35mins sorry, way out of whack. The portion above applies to me thinking this was VERY unlikely over a 1hour time frame only, for this rate at 35 mins burn, you'd have to (for example) have run over an 8mph speed while loaded with 80lbs for it to be...close to accurate.

I bought the same heart rate monitor and used it for the first time last week. I did a high-intensity Cardio Circuit that my trainer set up. (We are doing a Biggest Loser competition at my gym, and I want to win! )

My workout was 1 hour, 20 minutes, and it said I burned like 743 calories by the end of it. I was shocked. Granted, that was the hardest I've worked out since I joined my gym, but still. I didn't think that sounded right. I have been working out consistently since November, so I am in better shape now.

Tonight I used my HR monitor while playing Just Dance on xbox for an hour, and that was more like 300 calories, and my heart rate never really got to my target of 151. So overall I think it's accurate. It just depends on the intensity of the workout, and if your HR stays in the target zone I think.