About the solution
In my case, I believe that playing the piano in moderation, abiding by some rules, has helped maintain my hands' independence as it provides daily exercise. At the end of each hour, I rest for periods of ten minutes, so it doesn't become a strenuous exercise.
This solution shall not include mention to the use of drugs, chemicals or biologicals (including food); invasive devices; offensive, commercial or inherently dangerous content. This solution was not medically validated. Proceed with caution! If you have any doubts, please consult with a health professional.