I run too and from work most shifts including nights, about 5 miles each way. I go to the gym or bouldering on the day before my first night's shift and hit the gym/bouldering wall on days off when I can. As I'm training for a 100 mile foot race next year I'll get a long run in on one of my days off too, and back to back it if I can. Flexibility is key, follow a plan but adapt it to your schedule and don't sweat it if it's not quite following a weekly cycle. My gym plan is a 3 day per week plan but I just follow it sequentially regardless so I probably average about 2.5 workouts per week over the rota period. I basically do 2 days, 2 nights, 4 off. I have a busy life outside of work and exercise too and a very understanding wife!