Im a 27 year old firefighter paramedic and i was on a training where major strenuous activity was used. I went through 3 evolutions of training, had my lunch and started my fourth. At this time I became very nauseous and just seemed out of it. I had plenty of fluids, water and gatorade throughout the day. I have no medical problems. I had a subway sandwich for lunch. After I was sat down my bp was 140/100, pulse 110 sinus tach with tall, peaked t waves. My potassium level was normal. After I was given fluids at the er, I didnt feel any better, maybe a little worse. I do take creatine and nitric oxide workout supplements and im in good shape. Does anyone know what could have happened?