My most hectic work schedule was 48 hours of construction per week and I still lifted consistently. Even ate better then usual. Not sure what your schedule is like, but 48 hours of manual labor can exhaust you. I also used to move furniture, did that for a year , while training and biking 7 miles each way to the gym. When I worked construction Id mix 4 cans of tuna in a container with mayonaisse, and get food off the lunch truck. Usually a whopper or something like that. Whenever there was some idle time, or a break, Id start eating the tuna, for lunch Id eat a burger. Drank alot of gatorade also. When I got home I immediately got dressed and took off for the gym. If I didnt, I would definately fall asleep on the couch haha. Take some caffiene if you need extra energy. usually once you get pumping youll get a second wind and be able to get through the workout. Then after a few hours in the gym, Id come home have a shake, maybe some more food and go to sleep. Then repeat. Hope that helps