Well this is something that is certainly expected, but I do think that there are some good ways to combat it. It is hard to stay active all the time and really working to aid the general workout, but little things like finding ways to move in your seat and move while doing other things can help.
I know of several guys who had developed cellulites when they quit work out abruptly. The advice was to quit gradually so the body can adjust. However, I don’t think a muscled guy should quit completely. Maybe even dumbbells will do for an exercise to at least maintain the muscles. By the way, I know of 1 guy who abruptly quit his work out and developed lung problems. So again, I’d say that after your body had endured the heavy weights in the gym, it is not a wise idea to quit.
You have to look at it this way.
There's nothing better for the body ~ Long Term ~ that some form of Resistance Training.
Do you need to go Heavy all the time ~ No ~ as that's how you get Burnt Out.
Rather than Stopping Completely.
Go into Training for Pump with Lighter Weights for longer reps.
This will not only give your Joints some rest, but will continue to maintain your Muscle.
Without further Fatigue.
Remember ~ there's Mental as well as Physical Fatigue ~ so change things up before you get burnt out.
You will avoid these Abrupt Stops in Training.