Wear my ring all the time except for climbing. It's never fallen off. Wife takes hers off for work but puts it back on in the evening.
the only time mine comes off is rugby (it's illegal to wear rings on the pitch) - but I've retired from that - and now when using a rowing machine to stop blistering and callous buildup from the handle which can be bloody painful
I wear mine all the time (except for certain 'evenings' ) .... its never occured to me to take it off when running or doing anything else actually as its just sort of 'part of me' now.