Heart Rate Spikes New Apple Watch

Check your own pulse at the radial (wrist) or carotid (neck), and see which monitor is closer to right.

A chest strap pulse monitor is usually more accurate.

Fit and position are the usual recommendations, then maybe un-pair and re-pair to reset, then a discussion with Apple.

Rather more expensive EMS monitors can misread during patient movement, sweating, and road irregularities, too.

I’ve seen routinely misreadings with earlier watches during moderate to heavy exercise.

Band and positioning and (lack of) movement all matter.

The trail band has worked the best of all I’ve tried.

If you have a chest strap, use that.

And if the readings diverge markedly from actual radial or carotid readings, discuss it with Apple.