Good physical condition is a basic prerequisite to any serious undertaking. Take into account that you will be going through physical trauma, probably experience at least mild shock, and have to heal some fairly serious piercing wounds. While it is not necessary to fast completely, food intake should be monitored to control for potential nausea and you should stay well hydrated.Also, if you are heavy, shedding excess weight can make it more comfortable. Most people have a better experience when they do at least some limited fasting and increase their water intake for a week to one day before their suspension. Although complete fasting is suggested by some, a light meal before suspension avoids "low blood sugar" and nausea.