Ok so today I tried to do my workout as planned, but headache came back during squat warmups at 135, but was bearable so I did 3 sets at 135. I figured that benching would make it worse, but I was able to do my planned 3x5 at 170 without it being aggravated, and preceded to do my deads at 205 without problems. After not squatting heavy I still had a good bit in the tank so I decided to try a tabata on the rowing machine to see if it was exertion headaches and I did fine going all out.leaving me extremely confused.why would relatively light squats give me an exertion headache but the rest of my workout not?