Hi,
VO2 max is a measure of the oxygen you use when exercising at maximum capacity and is basically a measure of your fitness.
Your test conditions will depend on which assessment method is used as there's more than one. For example, the Bleep Test you may have done at school is one method.
This is a useful page for more information. Good luck with the test. It's bound to hurt a bit though!!
http://www.brianmac.demon.co.uk/vo2max.htm
