I have no car to drive somewhere open and pleasant to walk. Until the weather deteriorated I could go round the block, but with ice and snow to negotiate I('m staying off the pavements - in any case there is a steep hill in the circuit, which leaves me puffing. So I walk round inside the house, in and out of each ground floor room, round the dining table, along the hall, behind the sofa.
There is always a cusp to general rules, where you come just outside the permitted behaviour, and feel it is unfair that you can't do what is just that bit beyond what is Ok for someone else. It is like the threshold for getting help with rent - if you are just above it you can end up worse off than someone who started poorer but is now eligible for various things.
Look on the bright side - at least you can drive to places like supermarkets, GPs, vaccinations.