When I train I eat 3600 calories a day to build muscle. I am taking 8 days off to recover and unload. Should I still be eating 3600 calories during those 8 days or should I cut back a bit since I'm not going to the gym?
ofcourse, maintaing your calories could also be a good idea. A lot of things happen on an unloading week or a week off. Recovery takes place, new fitness levels manifest themselves (period of delayed transmutation), fatigue disipates, etc.....you are also going to be able to store up a decent amount of energy to get ready for the following week when you resume training, change your program, or enter into a different phase of training.
if you are bulking you still need to feed your body during your recovery time, but you can ramp down the calories. bulking is typically 500-1000 calories above maintenance, if you are active, your maintenance level rises so should your calories, the inverse is also true, if you plan on hanging around, your maintenance drops and so should your calories. you dont need to be 1000 cals above your workout day maintenance all the time. hope that helps.