Exactly!
If her wedding was a remake of the Zigfield Follies, then her ring probably wasn't a dainty little chip.
I can see leaving it at home for a run.
Besides...fingers swell when running and if you are wearing a ring it is very uncomfortable and hard to remove until the swelling has gone down. Doesn't surprise me she would leave her ring at home. A lot of people jog or exercise less their jewelry.