The sediment in hard water can actually be good for you. https://www.mcgill.ca/oss/article/health-you-asked/you-asked-hard-water-dangerous-drink
Are you buying spring water or mineral water? Is it naturally sparkling or is it carbonated afterwards? Not that it matters, but you seem to be using the terms interchangeably.
I admit I'm not an expert in this water stuff. I just wanted to get rid of the dirty tap water and get a clean water. What I'm buying in the supermarket I guess is not natural, but a purified/filtered/cleaned water that was then carbonated afterwards. That's enough for me and my budget The label on the bottle reads (translated) "Natural Mineral Water - Carbonated" (in German original it reads "Natürliches Mineralwasser - Mit Kohlensöure versetzt" It then lists "Kation elements" (Natrium, Kalium, Magnesium, Calcium) and "Anion elements" (Chlorid, Sulfat, Hydrogencarbonat) ...
I saw a woman in the gym yesterday, late 50's easy, fit, but not crazy fit, standing on one leg doing an overhead dumbbell press for a good 30 seconds each leg. I can do the one leg balance, but adding in an OHP, nope.
As someone who has practiced Tai Chi (taijiquan) for years, I highly recommend the practice. Not only does your balance get stronger, getting off balance becomes more difficult as you are always unconsciously shifting yin-yang (substantial to insubstantial as needed).
%% I enjoy coffee also/amazing how much better it tastes with non city/ non chlorinated water. But city water stopped a lot of disease. Its mainly the sugar in sodas that does the damage+ sugar spikes on an empty stomach wrongly want to make me sleepy \ weak. EVEN a tasty , needed compound like salt can be harmful since i just read in Prevention magazine average American gets more than double the 2/3rd teaspoon needed of salt. Hard to imagine salt used to be so rare + valuable people got paid in salt.