Roll up (one's) sleeves phrase
To get prepared for hard, difficult or intense tasks you are going to do.
Don't you see everyone is working really hard? Roll up your sleeves and work with us!
Since I rolled up my sleeves and trained hard, my health has improved greatly.
You had better roll up your sleeves by lifting these beer barrels onto the truck rather than sitting there chit-chatting aimlessly.
The verb "get" must be conjugated according to its tense.
This phrase stems from the act of rolling up sleeves before performing some kind of work.