After retiring from rugby having played front row mainly I had some back/sciatic issues. None at all during my playing days. The doc said it was lack of movement after the sport activities. He suggested keeping active with stretching, walking, swimming etc..
my last job involved sitting at consols in police ops. Not good. Back issues started to occur. We eventually had a stand up consol put in and rotated using it. I also started "desk exercises" to keep flexibility.
I play golf and walk, either carrying the bag or a trolley. No way will I use a buggy regularly. A decent warm up before playing is also a MUST.
Nowadays I do stiffen up when doing heavier manual jobs but that is simply lactic build up.