Tai Chi and Qi Gong are ancient forms of exercise that can improve flexibility, strength, balance and stability.
From the NIH:
https://www.nccih.nih.gov/health/tai-chi-and-qi-gong-in-depth
Tai Chi Wellness Center in San Diego:
http://www.taichimasterhenry.com/
Qi Gong on YouTube:
https://www.youtube.com/watch?v=cwlvTcWR3Gs
Tai Chi on YouTube:
https://www.youtube.com/watch?v=cEOS2zoyQw4
