Does anyone know where the watch should be placed on your arm for proper HR monitoring while exercising? Or maybe anyone else experiencing these problems? During exercise, I'm having the problem of my watch losing my HR. I'll look down and it's 160, and it's 71 thirty seconds later... mid exercise. Really beyond irritates me. (crossfit, HIIT, cross training type work outs) I've tried tightening the band, loosening the band, and nothing seems to help. I wear the watch about 1/4 inch above my wrist bone (toward the elbow). I have small wrists, and a very bony arm so I can't really place it closer to my hand. Thanks!