simple sugars are quickly absorbed by the body into the bloodstream and thus either stored in muscles for glycogen, used for energy, or stored in fat cells. thus you should stay away from them at all times b/c if you are inactive and do not need the energy, then the quick absorption is bad b/c it will create an insulin spike and the glucose will not be used for energy since u are inactive and will be stored as fat. simple sugars are a primary choice though postworkout as you need to restore glycogen stores and create an insulin spike to shuttle protein and the carbs. all other times of the day go with complex carbs b/c they are slowly absorbed so they have time to be burned off and also do not create such an insulin spike. good examples of complex carbs are oatmeal, brown rice, sweet potatoes.