So maybe 80 isn’t too big a worry ?
In that situation, no way. It’s standing heart rate, presumably being active, bending over to check your bike/getting it out of the garage/car etc ec, sounds spot on.
RESTING heart rate is when you are lying down fully relaxed, pref late at night but not having recently eaten, drunk booze, coffee tea etc.
Heart rate has nothing to do with heart disease anyway. You might think there is because very unfit people might get their heart rate up doing slight exercise, and they might also have heart disease.
HRMs are a training tool, if you want to train then learn how to use it and what it can tell you. Otherwise, wtf did you buy it for? 🙂