My balance problem has mostly gone away maybe due to taking magnesium supplements.
I have read that meditation, yoga and tai chi might help manage my dehydration problems.
Also herbal tea of marshmallow or slippery elm.
Yoga is not my cup of tea though tai chi seems perfect ...
Never having heard of tai chi, I found these videos helpful:
In case anyone else is interested I found this thread:
https://permies.com/t/278349/Tai-Chi-Rejuvenation
One that is mostly about Yoga:
https://permies.com/t/187334/personal-care/good-yoga-tai-chi-recommendations 
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