How are people burning such high calories

I've never come close. In my spin class, the instructor said you could burn 750 calories/hour. I think I was more like 400 - when I checked my HRM.

^^^^^ this! stick with your HRM. I go to zumba once a week usually and they claim you can burn 600-1000 per hour.. false. I burn around 300-350 in a good class (45 minutes). I burn the most when I run to be honest. everyone is different. I think too many people depend on the numbers MFP gives them but they are WAY off... especially when it comes to stationary bikes and ellipticals. same with the machines.

focus on YOUR burn. I know if I want a super high burn I gotta put the work in. yesterday I ran a 5K on the treadmill plus kickboxing... about an hour and a half of exercise and I got a 750 calorie burn. i was very happy with that but knew i had to put in the time. when my friend and I both take kickboxing, she tends to burn more than me (we both wear HRMs) and I know the difference in calorie burns has to do with our weight, height, etc.

My HRM has me burning over 500 cals jogging at 5mph for 30 mins. Machines and MFP have me at about 415 cals.


QUESTION- aren't you supposed to subtract calories off whatever burn your HRM says to account for it tracking what you would burn in an hour just breathing??

I play football every Monday and Thursday (5 a side) and I use a HRM. I play for about an hour and a half on average and range anywhere from 1000 to 1750 cals burnt depending on how heavy I am at the time and how hard I go at it. It is very much HIIT so not staying in zones ofc. The thing is , my body burn on average 150 cals an hour regardless of what I am doing so you can take 225 cals off whatever the HRM says for me over 90 mins to truly find out what the exercise has burnt for me

I wouldn't go off MFP. It's estimations are out. I ran for an hour cross country And my heart monitor said 700, MFP said 1k.
It's certainly possible to do 1k in an hour though, it's the intensity.
Certain crossfit work outs I do I burn 300 in 15 mins

Seems to me (as others have stated) they are getting incorrectly reported and over inflated calorie burn amounts on MFP. Since everything on here is user-input, you really have to double check your calorie counts and burn amounts. There are MANY errors on exercises as well as food/calorie overage and underage.
When in doubt, double check and always use your HR monitor and your weight for kcals burned.
Hope that helps!

irrelevant. who cares?

questions you should be asking yourself are things like "what sort of exercise regimen can I commit to doing regularly?", "how should i structure my diet in a way that will keep me satiated?", "what are my fitness goals?"

This

I have the Polar FT7 and burn as much as 1100 calories in an hour on the treadmill. This is at a 6.6mph pace with some walk breaks. My average HR is 155-160 with max 178. I am 6' and 180lbs. My cycling is about 900-1000 calories/hr. This is not inflated and seems to be correct as I am eating 2300 calories/day and losing almost 2lbs each week.

I suspect they are using the inflated numbers given by MFP.

This. I never burn as much as MFP says

I think that the MFP calorie estimates are inflated in certain areas. For instance, I bike commute. While I don't ever coast and go faster than the "vigorous 14-16" MFP category, it says that I burn over 800 calories an hour doing this. When I jog on a treadmill for 45 minutes, my hr monitor says I burned about 500 calories. I'm a bit winded after biking but am wiped out after the jog, so I don't think that I am burning calories at a higher rate by biking.

And it matters because If I am eating back all of my exercise calories and they are inflated, then that will affect my weight loss. So I don't eat back all of my exercise calories. It would be nice if after all the work I do logging that it would be based on accurate information. Any suggestions or constructive criticism would be appreciated.