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I had my hrm chest strap on and whilst the hr raises steadily to where is should be during exertion, on the way back down it occasionally seems to drop in large chunks until its where I'd expect it to be. Just tried it then, walked quickly up stairs and had a hr of 105..it dropped steadily to about 95, then next reading is 75 (probably where I'd expect it to be 20 sec after climbing stairs), before declining steadily back down to resting. Is that normal? Or is it buggered?
I've tried it at both 1 sec and continuous data recording, makes no difference
Strap is pretty new, battery new, and plenty of ecg gel so no connection issue.
Is your heart still in warranty? 😁