I reckon the stress of doing those tests and comparing yourself to annoying AR- must put at least 10 years on you - so won't bother?
Tai-chi and Gigung are wonderful to help with ageing, balance, memory, breathing, coordination, etc. Now that my knee has been done- I should be able to stand again for longer periods and go back to it- can't wait.
Gi-gung breathing and exercises have really helped with coping with pain in last 3 weeks, including with the physio pushing me to the limits.
AR did look after her mother when she suffered from dementia- but I reckon not having the massive worries and stresses and demands of bringing up a family may well have played in her favour.