Huge man, the basic ones are no food 2 hours before, no liquid 1 hour before, don't have any caffeine within 12 hours, no exercise within 4 hours and don't go to the bathroom before. it works by shooting electric pulses through your body the electricity returns faster when you have more fat rather than muscle and it establishes your BF based on this. All the things above affect the water in your body greatly and will effect the results greatly. Did they charge you man?
Oh yes...that. I thought you meant during the test. Here are the guidelines they gave me, though they differ from yours:No alcohol within 24 hours No caffeine day of testing No food within 4 hours No exercise prior to testing 16oz of water within 1-2 hours prior to testing