My 10yr old DS did a science experiment today involving checking your resting pulse and then trying different exercises and seeing how the pulse rate goes up afterwards (standard stuff - jogging on the spot raised it more than yoga, etc).
However, on the most strenuous exercise he tried (running up and down the stairs - he was visibly hot and panting by the end) his pulse rate was low - lower than resting in some cases - all three times he measured it immediately after the activity. He was using a digital blood pressure cuff which also shows pulse and all the other readings seemed to be just what I'd have expected - his mean resting pulse was 63, which is low but in the 60-100 range and BP seemed normal throughout.
He said he felt fine other than being out of breath (and that cleared up within a minute or so) and he had been drinking mouthfuls of water throughout the various activities - what could have caused this and from your own experiences, do I need to make a GP appt to have his heart investigated off the back of this?
Google is not being very helpful, suggesting everything from it being a sign of super-fitness to imminent heart attack and most stages in between.