If you normally train at night and decide to take the night off, replace your normal protein and cabr meal with a protein and fat meal with some veggies. There is no need to load up on carbs before bed unless you are trying to grow a gut. On off days cut out your carbs about 4 hours before bed and switch over to meat, eggs, cottage cheese with almonds, or oils, efa's etc. Those sugars are intended to spike your insulin around training time to shuttle amino acids and glycogen to the working muscle. If there aren't any "muscles working" it will shuttle those sugars into storage if to much is ingested.