What an athlete considers as rest time is actually the time in which the body build new structures and support systems as part of the adaptation process. Sure you want your body to do the best work it can, therefore what you give the body (through food), can determine the quality of the work that the body will do for you. The principles therefore would be to eat quality, fresh food with lots of whole grains, fruits, vegetables, lean meat and dairy and keep to a regular schedule of eating. Still concentrate on adequate water intake. Now is sure not the time to give in to binge eating or junk food. A small treat here and there is not a sin, but what they say: Junk in, junk out.