Every dog needs some exercise and OES’ are no different. A walk each day in both the morning and afternoon is a good idea (it’s good exercise for us humans too!), and then they will basically lie at your feet for the rest of the day.
That’s not to say that they don’t enjoy a play during the day as well as mental stimulation. Time spent engaging with you can benefit both of you in bonding with one another which is an important aspect of owning any dog, especially an OES!