Have you thought of trying a
bench hive (essentially multiple hive boxes, or even colonies, horizontally rather than in a vertical tower)?
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I have thoracic outlet syndrome (a nerve crushing syndrome) which has resulted in pain and atrophy of muscles in my upper arms and hands, loss of function and dexterity in my left thumb and constant 'numbness' in my hands (specifically thumb, index and middle fingers). Coming out of winter last season my right hand, in compensating for the weaknesses of the left, tore the ligament on the inner part of my right thumb which has literally only just become functional again as well (6 months!).
So weight bearing activities are impacted for me too.
With chiropractic treatment this season I have regained some feeling and reduced the strength of numbness but I have struggled with all beekeeping tasks - lifting heavy boxes being a big one! My intention for lifting is there but my strength and grip just can't be trusted right now and dropping a box of bees is not fun for anyone!
This has caused me to investigate strategies to assist my beekeeping which has always been a solitary activity that I have enjoyed in an almost meditative way. One of those ways is to use an empty box to move frames into rather than lift a full box of frames off the hive - it just takes some extra time but does give you opportunity to see your frames on an individual basis more often and keep your boxes/frames propolis free and moveable.
I know a few people who do use 3/4 boxes for everything, not just honey supers, and this does assist in the weight bearing activities - I have yet to need to move to that as I don't have a lot of hives and I am not commercial so I don't have a lot of time pressure in my bee work.
I am very keen on trying a
bench hive (not a top bar hive but an actual bench hive with frames just the same as your normal brood boxes).
I have access to one now so will be experimenting with it this coming spring.
The main thing I have learnt overall is not to give up and that you can get things done - just perhaps not in traditional ways (great for creative problem solving!).
I also have to factor in the extra time I might need to get the tasks done and not give myself a hard time about that (the mental load you put on yourself about these kinds of things can be just as stressful as the physical condition itself).