1. Dizziness lasts few seconds, maybe 10 tops 2. Dots vision 3. Mild headache 3. My heart does pump faster when playing (not really relaxed) 4. never lost consciousness in the past 5. I do have a heart rythem issue 6. Not sure what you mean about short winded? but if you mean you, i can't breathe that much or hold it for long, then yes.