My grandmother who lived to her mid 90s did a lot of arm exercises to get the blood circulation going. She would stand up and just fling her arms up and down.

Saw this earlier this year (it's a body airbag for old people in case they fall. Invented by a Chinese so eastern way haha), reminds me of the bike helmet some Swedes demonstrated a few years back

https://www.youtube.com/watch?v=p9W6wNfzsIE