My resting heart rate is around 60bpm which I'm happy is perfectly fine. However for example today I checked it at 62bpm then 3 minutes later it had gone up to 110 by just going outside and finishing up a bit of painting on the fence. This seems to happen whenever I do anything slightly physical, we have guinea pigs and cleaning their cage out can take it up to 140bpm in no time at all. I don't see how this can be normal, is it purely anxiety as I'm thinking about it beforehand and aware of being able to feel my chest. Does anybody else have a similar experience?