Apple watch inaccurate

I recently purchased brand new Apple Watch SE. I have an issue where every workout is very inaccurate. Example, I workout about an hour and a half, and my exercise ring is closing only for 10 - 15 minutes, calorie and other stuff is very inaccurate. I have done a recalibration and everything, it is still very inaccurate. How can I fix this issue and why is it happening?

Thanks!