Concrete is hard on the legs and feet....
Folks with arthritis and just ordinary folks who stand on concrete for long periods would benefit from having plywood or other shock absorbing material around the outside of the saw's base. You could even place it and level or secure it on top of the plywood. You don't want it to shift or rock in use, so whatever it takes to hold it in place is good. It's own weight may be enough without bolting it down. Wedges can be used to keep it from rocking and a little glue will hold them in place.
How big is the shop and how big is the saw? Photos?
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)