I worked as a lecturer until I retired at 62 (not due to ill health, I'd paid extra contributions to retire early). A lot of time was spent on my feet as I taught lab classes. I sometimes felt a bit tired, but not like OP describes.
In the last few years of work, I started cycling there some days - 10 miles each way. I actually found that the days I cycled I had more energy for the rest of the day. Maybe more exercise could help?
Fundamental reset for social care?
Interference by Trump in the World Cup.


