The game's been played competitively for more than 25 years now, people still earn their living plying StarCraft. You wont find a single one of them with APM below 200. Having their livelihoods and legacies depending on this, do you think they'd be repeatedly doing something useless instead of optimizing?

Anyways, I think you are missing the point that this thread is about active sitting. I imagine there isn't much difference to the meaning behind movement: movement is movement, meaningful or not.