Construction Worker

Hey all
Just started a new job doing cribbing for new homes. Just curious with all you other construction workers out there if you modify the intenstity of your workouts. Right now I am just feeling tired and I know this is from the physical work, so not sure if I should ease up in the gym or just pop a little bit of caffeine near the end of the day. Any adivce or tips for dealing with this would be helpful…Also just so you know I am starting week 3 of BBB planning on doing it for 4 weeks, but possibly switching the DE and ME days up and taking it to 8 weeks. Thankx