A lot too will depend on how serious you are about the work you do with them is. If you just want to play around balance is not as important as it is to someone who takes their work with them seriously.
This may sound a bit odd but one way the amount of dried blood under a bruised nail is reduced is by heating the end of a bent paper clip and applying it to the top of the nail. The resulting hole allows excess matter to escape. No kidding; doctors will even do this.
When your blood sugar is to low lethargic is one way to describe the way you begin to feel. As it drops lower you may experience blurred vision, shakiness, sleepiness and slurred speech.
http://www.karateforums.com/viewtopic.php?t=8238&start=0 Here is another thread on the same topic. So I am going to close this and let's just use the other thread.