By "strength" I mean physical strength, not mental strength, combat strength, or anything else. As a being of forcefields and light, is the EMH stronger than the members of the crew (including Tuvok)? Or is he only about as strong as a typical human being of the same size and build?
Also, can the EMH become stronger through alteration of his program? I would assume so, but how strong? Strong enough to defeat all of Voyager's senior staff (or entire crew) in a Tug-of-War contest?