Why am I not getting the same calories burned?

Question

I just did a HIIT workout that was full body and over an hour long 
The YouTube video said you’d burn 800 calories and people in the comments said that they burned 810 calories or more and for 8,000+ steps 
I got 8,400 steps but I BARELY burned 500 calories
I pushed myself soooo fucking hard.. like the hardest I have in a long time in a workout and I’m 300 calories off 
Why is this???? How did everyone in the comments burn the correct amount, but I’m 300 off??
Even my total calories are no where near 600 let alone 800
It doesn’t make sense because when I go on an hour long walk, I burn 450… but I just did an hour long HIIT workout and only burned an extra 50 😤 
The math just isn’t mathing!!!

Answer

Registered dietitian here. Everyone is different. I highly recommend not paying attention to calories burned or calories eaten. It can be very disordered and stressful to body and mind to count calories. 
Focus on getting your activity in- you still got all the benefits of the workout for your strength, cardiovascular system, muscles, bones, etc

Answer

because it depends on your body and your weight. The calories a fit person burns in an hour it’s not going to be the exact same as it is for a fat person, a chubby person, an average body, a skinny body, etc.

Answer

Take the numbers with a grain of salt or it'll drive you nuts.
I track my workouts on an app plus wear a fitbit, and they always give me different numbers of calories burned for the same workout.

Answer

Not everyone burns calories the same way. For example, someone overweight burns more calories than someone fit

Why am I not getting the same calories burned?

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