I'm 67, have operated a landscaping service for 30+ years - lots of lawn mowing and weeding.
I don't have problems while I'm doing the work but when I go home my lower back is very stiff.
I don't have problems during the winter when I'm not working.
Was hoping someone could recommend a good system (maybe a system with a name I could Google?) of exercises I could use before I go to work (preventive) and a set of stretching exercises I could do when I get home.