I am 75 years of age, a retired Professor of Management and I continue to provide manager development workshops and organisational consulting. I write a blog on mindfulness to keep my mind active (researching and writing), to remind me to be mindful each day and to learn new mindfulness practices. Some of my blog posts cover the challenges of aging (including those I have experienced, especially as I play social tennis on a weekly basis):
My blog posts on aging:
https://growmindfulness.com/?s=aging
I have a close female relative suffering from Alzheimer's so I am reminded daily of its devastating impact on a person's quality of life.