Blue Harvest was the codename for the filming of Return of the Jedi. The project was believed to be a horror movie, in order to keep things under wraps. It was also a reference to the novel Red Harvest, and indirect influence on Star Wars. Fun fact: Family Guy made an animated Star Wars movie called Blue Harvest as a nod to the title.
Staying fit is certainly a commitment. Besides doing the physical training, there are some other factors to consider, like nutrition