hi , ive recently returned to playing football and been doing quite hard training , lots of long sprints etc , and the last 2/3 times i've felt my heart beating faster (which is normal i know) but it feels more prominent and beating a bit harder. is this normal? i obviously feel like im breathing heavier too but i regain normal breathing after a minute or 2 of rest.

It isn't like palpitations , its just a more prominent heart beat. should i be concerned? this also doesnt stop me exercising it just sometimes makes me think about training as hard