considering everyone says the watch is good at calculating my overall daily walking and steps, how is it that Apple Watch know if not shaking my hands for other reasons; whatever the wide variety of reasons may be. How is it that Apple Watch tracking is so accurate? If it really is. I'm just wondering how accurate is it really if I'm at work and carrying boxes, thereby not swinging my hands but walking .2 miles every 10 minutes. Or If im at home jamming out air guitaring it. Or at a concert and violently clapping my hands between that 7 minute encore. Or in a 18 person meeting and I shake every individual hand. Etc.