hey, i play alot of soccer, im an extremely fast player and sprinter though i dont always run or jog regularly. this season ive been finding after 2 runs at full pace i find my heart beating uncontrollably fast and sometimes fell like im hyperventilating. my last game i experienced this and thouhgt i was going to blackout or worse. im currently reading up on the buteyko method of breathing, but im curious as to what could be causing this. and what exactly could happen, i mean i FELT like i was going to pass out, would i just black out with my heart rate that extremely high and my breathing as intense? what would my body do and how concerned should i be of these occurances.

any and all feedback would be much appreciated. thank you.