On hitches where the weather made tossing weights around a dangerous evolution, the good old fashioned push up, sit up and leg lifts work great. Every time throughout the day that I hit my room, I’d press out 20 each before leaving. By the end of 60 days I’d be doing about 40. That’s a butt load by the end of the day. Won’t help much on tugs, but deep sea you climb enough ladders all day. Make that harder by stepping high and fast. can skip steps doing the same. Who needs a stairmaster?! (just be careful about it) Also, when chipping and painting, make it harder. Don’t choke up on the paint brush, hold it by the end. Those that scoff at that, try using a 12" radiator brush like that all day. Use the needle gun with one hand even if chipping a vertical surface. But don’t slack off on the performance, the mate will get pissed(rightfully so).