The following guidelines should be followed to prepare for your body composition assessment
BIA Pre-Test Protocol
Consume 2 to 4 glasses of water 2 hours prior 
No alcohol within 24 hours prior
No food, exercise, or caffeine for 4 hours prior
No diuretic medications for 6 hours prior
Void body of fluids prior to test
Remove all metal jewellery prior to test
Do not wear pantyhose.
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