My watch will randomly spike up to numbers like 187 whenever I’m not doing anything strenuous. I have adjusted it and I am still getting readings that aren’t correct and I am not feeling bad or having any symptoms. I know my heart rate does not get that high. It will usually have one peek like that throughout the day and the rest will be more normal. I do take medicine for sinus tachycardia but the max it has ever gotten was 120 (read in doctors office) and I felt really sluggish and could feel my heart beating fast. Has anyone had strange readings like this? It happens almost every day.