Is Your Wrist Strap Not Getting Your Heart Rate Right?

Wrist worn trackers do not accurately measure heart rate compared to a chest tracker and or the gold standard, which is an echo cardiogram. Even if you can get that thing to be accurate, there are a million factors that go into that thing. So i'm stopping short of saying all these trackers are bullshet because i don't know them well enough to say that. But i'm coming pretty close to saying that. And this is just my opinion.