If you want quality answers you'll have to supply more information. Such as:
What is your current diet like? List what food, quantity and times you eat.
What is your current level of fitness? For example, do you run? If so, how often, how far and how fast?
What are the expectations for your shodan test? Will you be on the mat for 5 minutes or 2 hours? What types of activites will you be expected to perform?