One of the best tricks I used growing up was doing 10 pushups every time I died in games like counterstrike. The increased blood flow to the brain slightly increases your intelligence and decreases response times. It also acted as a gate to recklessness since you try harder not to lose. On top of that you get in pretty good shape if you game a lot.
Wouldn't that strain your arms so that your controls get worse in the next round? Though it certainly sounds a good idea to do some exercise in between such rounds. I am a top PES player ranking in the 1%, though I just sold the game so that I can get on with my life. Would have been a nice strategy.
