The main facets for an extended life , I think, are partly in the genes; number 2 is life style, which include healthy diet and regular exercise. I go, run and move every day. But, I think too much workout is also poor due to over-stress; sometimes those who exercise also several hours per day die early.
The nice issue about’Arrow’is we never state never on the show. Ideally the show will have a great long life , and all method of points can potentially happen.