I work 12 hour days/nights, 5a-5p or 5p-5a. Swapping back and forth from nights and days a couple times a week. I am a female and work as an operator in an oil and gas refinery. My job is very physically demanding including climbing up tall tanks and towers, working on pumps, and opening and closing large valves all outside in hot/cold weather....my question is: With that type of physical work, how long should i take off work after surgery??? im afraid i will get fatigued and/or dehydrated real easily post op if i go back to quickly.