I give my clients these tips every time they are preparing for a paramed exam

1. Take your medical exam early in the morning before breakfast
2. Do not drink caffeine or workout before your exam
3. Do not drink alcohol the day of or the day before
4. Stop taking any kind of workout supplement at least five days before your medical exam including protein powder (unless your physician has you on a regiment)
5. Try to keep your carb intake low for a few days before your exam
6. Stay away from trans fat and anything that is high in bad cholesterol

I hope this helps you or your client get the best insurance rating possible.