I don't think the calories on ur kickboxing session are accurate at all. Burning 1000 calories in 1 hour from just that doesn't make sense....
I could see why you might think that from your perspective / expierence. Let’s see if we can figure this out together.
For illustrative purposes, let’s make some assumptions about you. I am going to assume you are a 25 year old, female, weighing 175 lbs. (This is just an example.)
Let’s say you just took an hour long kickboxing class and worked your ass off. According to this burn tool, you would expect to burn about 550 calories! That is awesome! You should be proud of yourself and I really hope no one tries to diminish your effort.
So you might be thinking, “If I worked this hard and “only” burned 550 - there is no way he could burn 2x as much as me!”
But, surprising as it may be to you, I am not a 25 year old, 175 lb woman. Our bodies process energy very differently.
To illustrate this even better - think back to that kick ass class you had. What would it be like if you did that same class, but this time you were holding these.
Do you think the class would be harder for you? Would you burn more calories? Of course you would!
Now imagine what it is like for me to take this class. When I am doing the class, it is like doing it with these
Is it any surprise that I burn 2X the calories you do, when I am literally carrying 2-3 times the weight with every single step?
Now it is worth mentioning that wrist based trackers are not medical devices and will not be 100% accurate. They are designed to help show relative effort and encourage people to get active, which is exactly what they are doing for me :)
With that being said - I am a freaking athlete and I am proud of my burn and if you want to join me for kickboxing - you are welcome to, just try to keep up.