headache after running
i wonder if someone can asnwer me this question or explain it.
im 18, very healthy, i love to ride my bycicle to school; ive done it for 4 years now and also love running but two years ago i joined an air force ROTC unit at my highschool and got into the physical fitness team. we compete doing sit-ups, push-ups, pull-ups; thats the order in which we perfrom and somtimes 800 meters,1 1/2 to 2 miles run; here is where the problem is. the goal is to win by getting the fastest time so i run non-stop and i controll my breathing, i find better breathing like in-in-out-in-in-out than the regular in-out-in-out, it seems to me that i can pack more oxygen in my lungs breathings that way. i usually complete 1.5 miles in around 9mins45secs BUT once i finished moments later i would feel like tunnel to a black out or i would get this realy bad headache that only laying flat on the ground seems to make it go away. i have no idea wat it is. i eat and drink enough water before i run. i would appreciate your answer.