Male 22. my heart is very sensitive to movement if i move a leg a little or sit up my hr will go up 10-15 for a few seconds then back to normal?

Mind and body: Heart rate is not supposed to be constant. If you're really observant, you may discover your heart beats faster when you breathe in, slower when you breathe out. A little muscular work can speed the heart by increasing metabolic demand / carbon dioxide output, but it's even more likely that you've actually learned to speed it a bit by anticipating. Glad you're observing, and good luck.