Apple Watch is oblivious to the fact that Im standing.

I've searched this before, but this must be a different problem - I have been moving my arms. I just spent the last hour cooking, which involves moving around, chopping veggies, emptying pots after cooking, filling a container with leftovers -- LOTS of movement of my arms as well as of course my legs. And After 1.5 hours of this, I sat down to eat my lunch, and my watch told me it was time to stand! This kind of thing happens A LOT and it drives me up the wall. I may remove Stand reminders based on this level of blindness of the app. Sometimes I swing and circle my arms around and it STILL doesn't know I'm standing/moving. Suggestions? Jumping jacks? Make my watch tighter or looser? What is up?