iWatch counts my crochet movements

You are moving your Apple Watch arm.

The Apple Watch does not really know what position your body is in.

The Apple Watch uses the accelerometer to determine that your Apple Watch arm is swinging as you are walking.

It takes between 30 and 60 complete cycles of back and forth, normal walking, arm swings in a short period of time before the Apple Watch decides you have accomplished your “Stand” for the current hour.

If you interrupt the arm swinging for a few minutes, it will reset, and you have to start the 30-60 swings over again. Later in the day, it seems to require more arm swings, or if you keep having incomplete stand attempts, in the Apple Watch’s opinion.

In reality, you can just gently wave your arm around 30-60 times in a short period of time and get stand credit.

Knitters, sitting in a chair, always get their stand credit and huge step counts.

Professional Chefs, on their feet, working in a kitchen all day, miss their hourly stands, because their Apple Watch arm is often holding food being chopped, or carrying something when walking, or holding a pot, pan, etc…

No 30-60 arm swings in a short period of time, then no stand credit.

Another poster a while back suggested that you go to the Watch app on your iPhone, tap on Privacy, and turn off "Fitness Tracking". The poster said that his/her mother does this when she's knitting and it works, though perhaps is not ideal. Just remember to turn fitness tracking back on when you finish crotcheing.

Hope this helps.

Returns & Refunds - Shopping Help - Apple