I am not a teacher but have close relatives who are. I am in my 50s and following something of a health wake up call and needing to cope in a stressful long hours job means that similar issues have been on my mind.
I am working on improving my diet due to the health issues and in particular cutting saturated fat as much as possible. Lost weight as a result, although my BMI was in the normal range, my weight is closer to the middle than the upper end. Improving my diet is still a work in progress.
Found I was low on iron so supplementing and that has made a huge difference and no longer feel I am battling a hazy feeling which has helped at work.
I am hugely struggling with stress, due to workload, so have organised some help with this, but yet to have a first session.
I have always loved exercise, but health wise I was prompted a few years ago to take up swimming and cycling which I enjoy and the variety has helped. I need to do more for strength and flexibility. Outdoor exercise is a great mental health boost.
One ex teacher I know can't drive so has always walked miles she is very fit in her mid eighties.
Another one made a career shift to work in education admin. which meant she got through the final part of her working life supplemented with exam marking.