Let look into a suddenly Hart Rate jump when doing Sport, we have 2 explanations ready

Ok we count on that the Hart rate monitor was not malfunctioning, while it’s difficult to comment upon each individual case, unusual heart-rate fluctuations or sudden jump in Hart rate experienced by athletes could be Hart palpitations which are common in athletes, which is usually felt as a regular pounding or racing of the heart, when you feel your puls you can feel there is more action than usual.

Mostly there is nothing to worry about (puhh), but some do require further specialist investigations when you feel dizzy or you near pass out. Palpitations mostly result from a premature contraction of the heart muscle, which causes the symptoms mentioned we talked about above. The premature contractions are normally short-lived, the heart quickly returns to its normal rhythm after maybe 5 – 60 sec..

NOW here are our research in some cases, when you run and you are near you max. hart rate, maybe 80-90% and you have been going for about at least 10 min, we have tested that some who where removing there sweat from above there eyebrows with there whole arm, that there Hart rate suddenly jumps from 182 to about 220/230 for about 10-20 sec.

The reason is that your Hart suddenly have to pump harder to get blood into your arm and as soon your arm is down again your hart rate slowly calm down. Sometimes it can be so simple, so instead getting pills or 1000 tests, think logic first.