Im going back to a job, that consists of climbing up and down ladders allday, lifting ladders about etc, arms on the go all day, when i use to do it before, I would find i got tired after a few hrs, would any of these help for energy to keep me going?

I would be at work 8 hrs, so will be like a 8 hr workout lol, just wondered what i could take to work with me etc?